Hey.. judging from all the above replies.. i guess there are much flaming than holy water..

So how? Please try not to resort to turning to gay for this kind of thing. Shes that desperate to get to you doesn't means that you should become desperate to leave her too.. Love is illogical, irrational, inpractical and everything that is opposite of Reality.. Keep trying to talk her out of this relation.. give her time.. To rush things, you may create some side effects that may scar you for life... Like permanent gayism.. I am sure you will enjoy being a gay after you try it. =) haha.. no joke. Please, be a man, tell her like a man, bear the consequences, stay friends with her, but don't say it until like you really want her away liddat..
Sighz... I hate people like you.. girls that are faithful are so rare this days..
btw, don't hate her, the more you hate her, the more lonely she feels, and the more she wants your attention.. My case was i gave too much attention and she said she doesn't deserve me.. maybe you want to give this resort a try? sighz...
wadever, take care