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Relationships

The Psychology of Love, Crushes, and Attraction

by Dennis Relojo-Howell ·

couple holding hands

Psychologists often describe romantic love as a mix of passion, intimacy, and commitment. Early love and crushes activate the brain’s reward system, which is why they feel exciting and consuming. Over time, intense passion usually settles into a calmer bond built on trust and closeness, though some couples keep strong romantic feelings for decades.

If you have ever lain awake replaying a single text message, you already know that love is not purely a matter of the heart. It is also a matter of attention, memory, expectation, and some very old brain circuitry. And for some people, falling hard happens fast, which is why we have a separate piece on why some people fall in love so fast.

This guide brings together what the psychology of love can tell us, from the first flutter of a crush to the long, steady love of a couple who have been together for decades. Along the way it touches on the harder parts too, such as unrequited feelings and what limerence is, and points you to more detailed articles where they exist.

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What is love, according to psychology?

One of the best-known answers comes from psychologist Robert Sternberg. His triangular theory of love, published in Psychological Review in 1986, describes love as three ingredients that can be present in different amounts:

  • Intimacy: Feelings of closeness, connection, and warmth.
  • Passion: The drive behind romance, physical attraction, and desire.
  • Commitment: The decision that you love someone and want to keep that love going.

Different mixes produce different kinds of love. Passion on its own is what Sternberg called infatuation. Intimacy and commitment without much passion look like companionate love, the kind found in many long marriages and close friendships. When all three are present, he called it consummate love, the ideal many of us are hoping for.

A second influential idea is that adult love works a little like the bond between a baby and a parent. In a study of romantic love as an attachment process, published in the Journal of Personality and Social Psychology, Cindy Hazan and Phillip Shaver asked 620 newspaper readers which description best fitted their love life. Just over half (56%) described themselves as secure, 25% as avoidant, and 19% as anxious or ambivalent, proportions close to those found in studies of infants. If the anxious pattern sounds familiar, our guide to anxious attachment explains it in more depth.

Why do crushes feel so intense?

A crush can take over your thoughts in a way that feels out of proportion to how well you actually know the person. That is partly because you don’t know them well. With little real information, the mind fills the gaps with hopes, and the person becomes an idealised version of themselves.

Uncertainty adds fuel. In a 2011 experiment on uncertainty and attraction, published in Psychological Science, women who weren’t sure whether a man liked them a lot or only an average amount ended up more attracted to him than women told he liked them a lot. They also reported thinking about him the most. Not knowing kept him on their minds.

Novelty, anticipation, and the occasional rewarding glance or message do the rest, which helps explain why crushes thrive where they can’t easily be acted on. That is why so many people end up with forbidden crushes, or with a crush on a co-worker they see every day but can’t pursue. The intensity is real, but it often says more about the situation than about the person.

First crushes and first loves can feel the most intense of all, partly because everything about them is new. Psychreg has a separate piece on the psychology of first love, and if you have ever wondered why love is pictured as an arrow, see the meaning behind Cupid’s arrow. And when a crush has run its course, these tips to get over a crush may help you move on.

What happens in your brain when you fall in love?

Brain scans have given us a glimpse. In an fMRI study of early-stage intense romantic love, published in the Journal of Neurophysiology, Arthur Aron and colleagues scanned 17 people who had been intensely in love for between 1 and 17 months. When they looked at a photo of their beloved, rather than a familiar acquaintance, activity rose in dopamine-rich areas linked to reward and motivation, including the ventral tegmental area and the caudate nucleus.

Those are the same broad systems involved in wanting and pursuing things that matter to us. The researchers suggested that romantic love uses the brain’s reward and motivation systems to focus on one specific person. That may be why new love can feel less like an emotion and more like a drive: restless, focused, and hard to switch off.

It is worth keeping this in perspective. Brain scans show what is happening while you feel love, not that love is “just chemicals”. Your history, your values, and the person in front of you all shape what those feelings come to mean.

What draws us to someone?

Attraction rarely comes out of nowhere. Social psychologists have long pointed to a few everyday factors. We tend to be drawn to people we see often (proximity), people who seem to share our attitudes and interests (similarity), and people who seem to like us back (reciprocity). None of this is very romantic, but it explains why so many relationships start at school, at work, or in a friendship group.

Evolutionary psychologists add a longer view. In a study of mate preferences across 37 cultures, published in Behavioral and Brain Sciences, David Buss surveyed 10,047 people in 33 countries and found that, on average, women valued signs of resources and ambition more than men did, while men valued youth and looks more than women did. These are average differences on a questionnaire, so they say little about any individual, and culture plays a big part. You can read more about evolutionary psychology and attraction, or about why some people are drawn to “bad” boys and girls.

Closeness can also be built. In the famous experiment on generating interpersonal closeness, often called the “36 questions” study, Arthur Aron and colleagues had pairs of strangers take turns answering increasingly personal questions for 45 minutes. They felt closer afterwards than pairs who made small talk. But it was a study of closeness, not a recipe for love, and some of the follow-up studies in the same paper found no effect of the other factors they tested.

Love vs infatuation: How to tell the difference

The APA dictionary describes passionate love as love in which emotional arousal and usually sexual passion are prominent, with partners greatly preoccupied with each other. It describes limerence, a term coined by psychologist Dorothy Tennov in 1979, as intense desire and concern for the other person, with great sensitivity to how they react to you. Infatuation sits close to both: in Sternberg’s terms, it is passion without intimacy or commitment.

In real life the line is blurry, and most love starts with some infatuation. But a few differences tend to show up over time:

  • Focus: Infatuation is about how the person makes you feel, while love grows out of knowing who they really are.
  • Pace: Infatuation arrives fast and fades fast, while love builds slowly.
  • Flaws: Infatuation tends to overlook flaws or panic when they appear, while love can hold them.
  • Security: Infatuation often feels anxious and all-or-nothing, while love usually feels steadier and safer.

If your feelings have tipped into constant longing and checking, it may help to read about signs it’s more than a crush, as well as our longer guide to what limerence is.

How does love change over time?

Social psychologists often contrast passionate love with companionate love, which the APA describes as strong intimacy and affection rather than intense arousal. The usual story is that passion fades and companionship takes over. That is broadly true for many couples, and it is not a failure. A calmer bond built on trust, humour, and shared history is a deeply satisfying kind of love.

But passion doesn’t have to disappear entirely. In a review of romantic love in long-term relationships, published in the Review of General Psychology, Bianca Acevedo and Arthur Aron found that romantic love can and does last in long marriages. What tends to fade is the obsessive part, the anxious preoccupation of early love. Across 25 studies, romantic love without obsession was strongly linked with satisfaction in both new and long-term relationships, while obsession was linked with lower satisfaction in long-term ones.

Long relationships also bring difficult feelings, and jealousy is a common one. Rather than seeing it as proof that something is broken, it can help to ask what jealousy is telling you.

When love hurts: Unrequited love and limerence

Loving someone who doesn’t love you back can be one of the most painful experiences there is. Rejection hurts, and it is easy to fall into rumination: replaying conversations, searching for hidden signs, and blaming yourself. Our article on getting over unrequited love looks at how it affects mental health and how people recover.

For some people the longing becomes all-consuming. Limerence can keep a person locked on someone for months or years, often with very little encouragement. In other cases, love is returned but feels impossible to trust, and constant doubts about a partner or the relationship may point to relationship OCD. Both are worth taking seriously, and both respond to support.

Intense attention isn’t always a good sign either. A partner who floods you with affection, gifts, and talk of the future very early on may be love bombing, a pattern of manipulation that can come before control.

If heartbreak leaves you feeling low for more than two weeks, or you are struggling to cope, the NHS advises speaking to a GP, and in England adults can refer themselves directly to NHS talking therapies. Its page on low mood, sadness, and depression has practical advice. If you need to talk to someone right now, Samaritans are available on 116 123.

Fear of being single and fear of love

For some people, the hardest part of love is the fear around it. Some dread being without a partner, a fear sometimes called anuptaphobia, which can push people into relationships that aren’t right for them. Our article on the fear of being single explores how to build security from the inside.

Others fear closeness itself, keeping people at a distance to avoid being hurt. And some find solitude hard in any form, which is a slightly different issue covered in our piece on the fear of being alone. All of these fears make sense, and none of them has to be permanent.

FAQs

  • How long does a crush usually last? There isn’t good research to give a reliable figure, and it varies a lot from person to person. Crushes tend to fade faster when you get to know the person better or when there is clearly no chance, and they can last longer when uncertainty keeps hope alive.
  • Is love at first sight real? Attraction at first sight certainly is, and it can be powerful. But love, in the sense of intimacy and commitment, takes time to develop because it depends on actually knowing someone. Many couples who say they fell in love at first sight are remembering a strong first attraction.
  • What is the difference between a crush and limerence? A crush is usually light and passing, while limerence is more intense, intrusive, and hard to shake, with a strong need for the feelings to be returned. Our article on signs it’s more than a crush goes through the differences.
  • Why do I keep falling for people who aren’t available? Attachment patterns may play a part. People with an anxious style can find unpredictable or distant partners especially compelling, partly because uncertainty keeps them on your mind. Noticing the pattern is a useful first step, and anxious attachment is a good place to start reading.
  • Is it normal to stop feeling “in love”? Yes. The intense, preoccupied stage of early love usually calms down, and for many couples it gives way to companionate love built on trust and closeness. That isn’t the end of romance, and research suggests many long-term couples keep strong romantic feelings without the early obsession.

Explore more on love and attraction

Takeaway

Love, in psychological terms, is a mix of passion, intimacy, and commitment, coloured by the way we learnt to attach to others. Crushes and new love feel overwhelming because they engage the brain’s reward system and feed on uncertainty and imagination. With time, passion usually becomes something calmer and deeper, and some couples keep the spark for decades. When love hurts, whether through rejection, obsession, or fear, it is a very human experience, and support is there if you need it.

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