Why Do People Fall in Love?

Recently i happened to see many Facebook Posts where my college friends have married their college sweethearts and loving boyfriends. While i was in college and listening to their love stories, i never even thought they would marry them mostly because i thought it is just an infatuation and it will go away once they start living their real life. Another reason is that it is very common in India that girls and boys giving up their so called "love" when they find another suitable person for arr...