She can't accept you forgiving her because she can't forgive herself. It has nothing to do with you loving her/not loving her, or forgiving/not forgiving her. Okay, maybe a little, but she is pushing you away because she doesn't think you will forgive her. She is doing what she thinks is best for you. I *think* I can almost tell you what she is thinking. Let's just say she did get drunk and sleep with someone. She is ashamed. She probably thinks she doesn't deserve your love. You deserve someone better than her because she doesn't think she can stay faithful. You don't deserve the pain she is causing you and she is SAVING you from more pain (her mind, remember). I think you did good to tell her to let YOU decide if you will forgive her or not. She feels unworthy of your love and she probably feels like she will never be able to look you in the face again. There are a million other things going through her head I think. I agree with you that I think it is probably over because no one else would accept her being with you so much.
There are a million scenarios for what could have happened. I wouldn't play them in your head until she tells you for sure.
Melissa
At least, in the light of the truth, although it is harder now...she will hopefully be able to embrace some change.
"Standing knee deep in a river and dying of thirst."