You've got to heal, which takes time, and depending on what you need, it could take awhile.

You will question yourself and what you did. And you'll have to forgive yourself. And then you will have to somehow forgive him. It's awfully hard to do either of them. Maybe you'll just get to a point where you're at peace with it.

No matter what, you need answers. I don't know what sort of human being he is, but if there's a 3rd party who is willing to moderate an "exit interview" you should ask all of the questions you need to move on. He owes you that much. And if he won't give it to you, there's your answer right there - he is a fraud and everything you know is wrong.

Just get some time with him, ask all of the ugly questions you never want to know like "Is she better than me in bed" because you may not get that chance again and you don't want those things eating away at you. Closure comes from answers, seeing someone's true nature by correcting your perspective or both.

Best of luck. You're not in an enviable position.