Wait till she breaks up with him, then make your move.
I'm in love with a girl who has a boyfriend... What do I do?
I know it hard to watch the girl you like with another boy, but more than likely it will won't last very long. After she breaks up with her boyfriend comfort and be there for her, and be a good friend to her. Then she just might date you.
Be her friend if she has a boyfriend, wait until they break up, and then make your move. Just be nice to her, comfort her and ask if she needs anything to make her feel any better, then just go on from there, that's all you do :)
