Lifted from theconversation.com from the editor - Jo Adetunji (Editor of The Conversation UK)

Like, love, or ‘in love’?

Psychological research over the past 50 years has investigated the differences between liking someone, loving someone and being “in love”.

Liking is described as having positive thoughts and feelings towards someone and finding that person’s company rewarding. We often also experience warmth and closeness towards the people we like. In some instances we choose to be emotionally intimate with these people.

When we love someone we experience the same positive thoughts and experiences as when we like a person. But we also experience a deep sense of care and commitment towards that person.

Being “in love” includes all the above but also involves feelings of sexual arousal and attraction. However, research into people’s own views of love suggests that not all love is the same

Passionate vs companionate love

Romantic love consists of two types: passionate and companionate love. Most romantic relationships, whether they be heterosexual or same sex, involve both these parts.

Passionate love is what people typically consider being “in love”. It includes feelings of passion and an intense longing for someone, to the point they might obsessively think about wanting to be in their arms.

How does love change over time?

Research looking at changes in romantic love over time typically finds that although passionate love starts high, it declines over the course of a relationship.

There are various reasons for this.

As partners learn more about each other and become more confident in the long-term future of the relationship, routines develop. The opportunities to experience novelty and excitement can also decline, as can the frequency of sexual activity. This can cause passionate love to subside.

Although a reduction in passionate love is not experienced by all couples, various studies report approximately 20-40% of couples experience this downturn. Of couples who have been married in excess of ten years, the steepest downturn is most likely to occur over the second decade.

Life events and transitions can also make it challenging to experience passion. People have competing responsibilities which affect their energy and limit the opportunities to foster passion. Parenthood is an example of this.