Need advice on what to do about a girl that I like. But have never met. I've only seen at college. Please help?

Hi there. I went to college with this girl. I know nothing about her. I don't know her name absolutely nothing. It's driving me insane. I won't see her until September…that is…if I see her. Because we've finished for the semester now. Is there anyway I can find out about info about this girl? It's driving me nuts. I really am into her. It's really odd. Never had this kind of feeling for a girl I've never met or know anything about before lol. It's so annoying. Haha. Anyways all comments are aloud. Thanks