Gone crazy for this girl?

She dam pretty, smart, popular, nicest personality, but she has bf, but they been together for long time, i asked my friend to ask her what she thinks of me, she said im wired but very adorable, funny, nice and sweet, then my friend asked her if she ever thought of me more then a friend, she said not really, she said im always to shy to talk to her, she said if we come good friend for about 2 years she willing to become more then friends, she has the most amazing smile, we stare at each a lot in the corridors or whenever we p each other,i swear the look she gives me is out of this world, i think about her all day, many girls have asked me out, but turn them down, ppl say im gay, but they dont know i crazy about this girl, no one knows about it but one of my friends, what should i do, i never seen a girl like her, so i cant get over her, i try to talk to her but her looks intimidates me.