There's absolutely No excuse for cheating, sorry for your loss. Next time a woman puts her trust in you, don't screw her over.
They key here is you cheated
My advice is just to endure. The best you can do out of it is learn, we screw up, we get consequences.<br />
Then maybe we learn from our mistakes and be sure not to make them again.
You move on, if she has already expressed that she is not interested in you any longer then you should stop pursuing her. If, on the other hand, you did not ask her for another chance, you could and let her know you have changed, but be prepared to be turned down. Start looking for other people, and pursue your other interests.
You screwed up by cheating, you obviously don't wanna spend your life with her. Just give it time. You just need to pay the price and suffer. You hurt her by cheating so now it's your turn to hurt
Obviously it was a mistake but I doubt she will forgive you. Your best just to let it take it's course and learn from your mistake