Eric, isn't there any way to help him "detach" from her? and re-attach to me?

He has told me that he doesn't want to hurt me. But he has..sometimes it hurts just to be around him because I'm not getting what I want from him. To look at his face and remember all the good things we had. I know he hurts too..and I know he feels guilty about what he's done. I also know that his pride stands in the way of saying he's sorry. He's justified this A by believing himself and telling everyone else that he is in love with her. So, he's not like all those other guys who just cheat on their wives. Wouldn't it make more sense to do some stuff that will make him feel happy with me, instead of detach? I guess I associate detach with ignoring them..but that probably isn't it, is it? I don't know how to detach.I have read some stuff about it but so far it isn't making sense to me and I don't know how to apply it to my sitch.