However, you do need to go beyond this and it takes a lot of time. One of the things about DB I never fully agreed with was the notion that you could tango by yourself. Yes, you can have a happy fulfilled life living alone; however, it takes two to tango in a relationship. There are never two innocent parties when a D occurs or any relationship ends. Both have contributed hurts and problems along the way. This does not condone adultery.
I have been there. I divorced someone six years ago who was most likely a sex addict.
Nobody can take advantage of you or treat you badly, unless you allow it. Adultery does hurt; however, the more you ruminate on the idea of what you didn't deserve, the more you rob yourself of what you truly deserve. Just think about it a bit.