Dont ask any one else you should ask her.
You show him that your better then the other girl
Ignore her and go out with someone else
If this girl can't see that you like her, she's probably not worthing dating.
Just leave them and move on
reluctance
you can like her but that doesnt mean that she doesnt like you too
you can say that you like someone else and that there are other boys out there other than the one that the girl likes
Tell that girl to leave you alone, because you like someone else now...
Ask her if she'd like to go out, and if she doesn't, it's not the end of the world. Or, you could do the easier thing and go for someone else.
no hard pushing this. just be nice, if she okays good other wise find someone else.
let the best guy/girl win.......
convince her she made the wrong decision