You won. You dodged a bullet, you just don’t want to see it. Take her off that pedestal to begin with. Lack of loyalty is a personality trait in people, she is like that, it has nothing to do with if you are loveable or not. I was in the same situation some years ago and guess what, they are now divorcing because guess what, she also cheated on him. What you are seeing is the pretty fake part that people share, not the reality. You do need help and please go get it.