Why do we love someone?

Hi i think you have just answered your own question but on top of what you said i think we love someone because we all need to be love by someone.They say love makes the world go round.We love someone cause we care about them,we want to spend the rest of our lives with them,we want to share things with them we want to do things for them. Love is kind it's never jealous or conceted love is giving not receiving. These are just some of my thought on what love is