FI~ your description is very much "the same" as my H's. We are reconnection/reconciling and he has said that is "where he was" it wasn't that is was me, his wife, he just didn't want to be ..he was looking for anything to make him feel, better, happy whatever, just feel. he had pulled completely away from me, his family, his friends.....
Early on, even before first BD I guess he would say " I hate coming home" wanted to just keep on driving past the house, I never understood it at the time he said it...it was hurtful, but now I can say he said it without it hurting me as I know he was "not healthy" he was so pulled away from our marriage at the time.
tough stuff for everyone
31andcounting