I agree with opensea, try taking things one day at a time. I too am sorry to hear about your situation. The hurt you are feeling is right in your words. Seems like that is the nature of love, when it is mutual it can be the greatest feeling you've ever had, like the joining of two souls, but, on the otherhand, it can be the deepest pain you have ever felt when suddenly it's gone.
I too was in your situation many years ago in my early 20's. Got involved with this amazing man who, needless to say, I feel very hard for. Things were great, he said he was leaving his wife for good (he had been separated for over a year), we were together for almost a year, but did not live together. Then one day he basically disappeared. About five years later, I found out through a mutual friend who had recently seen him at a conference, that he went back to his wife, changed careers, and the most hurtful thing, he and his wife had twins about two years after they were back together!!
My point here is this, the only way you can truly get past this is to get some kind of closure, otherwise, the scar may always be there, just as mine is. I never did get closure. Even if the truth was going to hurt, I would have just wanted to know, or maybe even a simple, "things have been amazing, but I decided to stay with my wife". Something is better than nothing, and that something may provide the closure you need. If you are up to it, maybe contact him, not to get him back, just explain that you are trying to heal and move on and that you just want him to be honest with you. Tell him you need the closure, if he's the guy he led you to believe, he'll understand.
Also, as someone else mentioned on here, don't be afraid to love again. It may take a while to be able to trust someone again with your heart, that's totally normal. But if you are too afraid to open up again to someone again in the future, you may miss out on the opportunity to feel the way you did for this guy again. Remember, the future is what we make of it, don't let those in the past affect your path to the future.
Best of luck to you, these things always seem so hard to go through when you are deep in the trenches.