I can totally relate to feeling guilty, but you don't have to. You are doing the best thing both for her and yourself.

If she comes back trying to win you back, don't fall for her words (or good acting) until you see a real change in her action/ behavior. People can say all the right things but do they match up with their behavior? Just be on guard to protect yourself.

Thank you for having the courage to post this. I'm sure there are other people going through something similar and it's helping them.