Sounds like you need to talk. You will have to decide if you can trust him. But before that I think you need to ask him some hard questions. Does he want a monogomous relationship? Is he willing to do the things to work toward a healthy relationship? Is he trying to get revenge for the past? Is he having an affair?

I cant say this is the best to do, but it seems as if these are the things you would want to know to move forward.

esthersvirtue