What should you do if you love a girl in your college but you don't know each other and you don't have any common friends?

You must see her on campus and must have spoken to her at least once or else it's completely a physical attraction. Many of us meet people once or twice and hardly talk to each other, but the only way you are going to get to know her is to ask her out. If she is sitting somewhere studying inside the building or outside, walk up and introduce yourself and ask her if she would like to go to a movie or a party that is coming up. That's the only way you are going to get to know this girl. Good luck Marcy