There can be no resentment from past transgressions. That'll just lead to its own set of complicated issues and have you right back here again. When your H does come back, you'll never rid him of his guilt for what he's done but you can help him to live with it by being comlpetely non-judgemental about it.
Wow Kev, that is a gem! I'm totally keeping note of that, what a great way of expressing it.