What is Love?

Romantic Love

Is love chemical?

Love can't be just pheromones, surely body chemistry changes. Although, perhaps that is why people break up after a while. Maybe they were attracted to each other at one point, but then the pheromones they were giving off change and the other person is no longer attracted to them.

What is attraction based on? What attracts one person to another?

People have said they have fallen in love before meeting in person, thanks to the Internet. Pheromones can't account for that. If someone falls in love, without meeting the other person (in-person), what is left? Voice, a photo or two, etc. Perhaps attraction is oral. But attraction can't be just voice, because plenty of people are attracted to people they have only seen in photos.

It seems like attraction is a very multifaceted concept. People fall in love without meeting
Can anyone fall in love without meeting the other person? Can someone fall in love with someone they have seen only in a photo?

This seems unlikely, so perhaps love is based on being attracted to...