Hmmmm, this is a hard one. You might want to be her friend, you know, be there for her and talk to her about everything (including her crush). Once she trusts you, she will be much more open. Try to emphasize the more jerky ways of her crush, but subtly. Also, forget about being made a fool of, buy her some flowers on valentines day or something. Girls just LOVE nice guys. And really (im talking with experience), once you confess yıur love to us girls, we kinda just automattically love you back. That simple. Hope this helps!
try to impress the girl if that doesn't work sorry shes gone
you cant.. sorry
say to the girl your boyfriend has been cheating on you and after impress her and ask her out simple.
Find a way to impress her.
Treat her better than her boyfriend does.
You can't.
Tell you her your feelings about her
That's NOT Cool man.
ignore her
just by being your self
just a friend
wait until she breaks up with her boyfriend and then make your move