To me that whole "I can't look myself in the mirror" sounds like either melodrama or something worse than simply cheating. She left you and basically indicated she wanted a divorce. From what I've seen on here, there isn't a whole lot of guilt about sleeping with someone. It seems to me most have a "why shouldn't I, I've already told him we were done. It's just a formality to get divorced". It sounds like dramatic self-flagellation as lead up to telling you so you won't feel the need to get on her case about it too much.
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer
