When Two People Are Really In Love, Psychology Says These 4 Things Just Happen Naturally

Truly in-love couples don't have to force these things, they just fall into place.

Last updated on May 22, 2025

Two people really in love. Rido | Unsplash
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Falling in lust is easy. A biochemical, hormonal response to someone you feel drawn to, attraction is a powerful evolutionary drive. Intense passion, putting the other person on a pedestal, spending all of your time together, many people interpret these feelings and actions as love, and they are!

It may just be early-stage, short-term love, though. The late biological anthropologist Dr. Helen Fisher's research explained how passion changes over time in a relationship, and the early phase has increased dopamine activity in the brain's reward pathways. Passion and obsession can set the stage for a different form of love to follow, but they are not indicators of long-term romantic love. Lasting love requires attachment, which takes time to develop.

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When two people are in love, psychology says these four things happen naturally:

1. They make it past the honeymoon phase

Fueled by a heady mix of hormones based on attraction, the honeymoon phase is intense. During this time, couples tend to have boundless energy, feel emotionally or even physically ill when they are apart, and place each other at the center of their universe. It is an exciting time, but ultimately unsustainable. 

After a period, which is often six months to two years, the honeymoon phase comes to an end. While it could be a slow transition, for many couples, it is a dramatic crash and burn. Real life intrudes, human flaws become overwhelming, and the passion dissipates. It is as if a harsh light is turned on, suddenly illuminating everything that is wrong with the relationship. 

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Many couples break up at this point. For those who remain together, however, the push and pull of the inevitable power struggle teaches both partners how to live with each other. They learn to fight in ways that allow both people to win, not to dismiss each other or overly criticize, and to support each other when things go well. 

They prove their commitment to each other and to working things out. Once this “real-life” compatibility testing has started, then long-term attachment can begin.

If this all sounds familiar to you and your relationship has reached the attachment stage, odds are good that you are in love for the long term. You have made it through the intense feelings and the rough patch that followed, and now have the deeper commitment to your partner that lasting love demands.

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2. They change for the better

Happy couple in love changes for the better Andrii Nekrasov via Shutterstock

Learning to compromise and work things out is the only way to successfully navigate the power struggle phase of your relationship. Therefore, simply by completing that phase, you have both developed some powerful coping skills and learned to be better people.

Beyond that, though, people who are in a relationship are shaped by their shared experiences. Whether you take on your partner’s strong work ethic or they pick up your habit of being 15 minutes early for everything, your relationship can help you improve as a person.

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It takes trust and a strong belief in the other person, however, to learn new habits rather than being threatened by them. If you can see personal growth since you started dating, chances are you are in love. Dr. Fisher explained, "The endorphin system begins to take over, giving partners feelings of safety, stability, tranquility, and peace. Perhaps as feelings of attachment grow, the production of oxytocin and/or vasopressin or the sensitivity of the receptor sites for these peptides increases as well."

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3. They become part of each other’s worlds — but not each other's whole world

If you are in love, you have met each other’s families or are making imminent plans to do so. You have mutual friends. Socially, you are considered a couple, and invitations typically go to both of you. You automatically check in with each other before making plans, and your partner is the go-to person when you get good or bad news.

What makes this different from the intense togetherness of the honeymoon phase is that you are no longer shutting out everyone else. You spend time pursuing your hobbies, friendships, and family relationships. You miss each other when you are apart, but you don’t feel the need to always be together.

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You trust each other to live your own lives, confident that you will come back together soon. You encourage each other to pursue career, educational, and personal goals, even if that means spending time apart.

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4. They refuse to imagine a future apart

Couple in love plan for future JodieWangss via Shutterstock

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When you think of where you want to be in 5, 10, or even 20 years, your partner is an important part of that plan. You are dedicated to finding compromises and ways of uniting both people’s individual long-term goals.

You feel confident you can overcome whatever challenges come your way as a couple, and you believe you are stronger together than apart. As Dr. Fisher noted, all the basic drives are associated with dopamine, and all these drives lie along a continuum. Thirst is almost impossible to control, while the sex drive can be redirected, even quelled, and romantic love can be even stronger.

You are finished with the dating scene and ready to move forward as part of a strong and stable twosome.

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RELATED: Women Who Always Find The Right Guy Tend To Do These 5 Things Right, According To Research

Neuroscientist Lucy L. Brown, Ph. D., and the late biological anthropologist Helen Fisher, Ph.D., are the writing team behind the Anatomy of Love. Their work focuses on matters of the brain and romantic love.

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