There is such a thing as too much honesty. You know a lot, and it is bad enough. You don't need to know more. You need to move in the direction of forgiving each other for the ways that you hurt each other, and you both need to work on being trustworthy not to hurt the other again. What he did to you is bad. But don't overlook the things that you did to him. If you are blind to your own faults you will repeat them. And then he will repeat his.