Well affair or not, you will need to forgive him. More for YOU than for him. The ball is still very much in his court and there is not much right now YOU can DO to get it back. I guess continuing to get on with your life and living it to the fullest is the best you can do right now. This is YOUR journey and you must heal to be able to have a new relationship in the future whether that be with your husband or someone else. No matter what, your old relationship is DEAD, I really don't know who you will have a new one with. I would say for now, you need one with YOURSELF.