I cant seem to get over him and the issue- what can I do?

I just need some advice on how to get over this break-up and the situation itself. The situation was that I have been in a relationship with a man that has been married and didn't tell me that he was until he became a Christian. After he became saved, he told me that he wanted to be with me and do things right, such as get married and have a future with me. All of the sudden, he misleads me by saying that God dont want us together and he might wanna work things out w/ his spouse, which I think is crazy cuz he told me that he didnt want her and he wanted me instead. I have been used, manipulated, mislead, and was gullible all this time for 3 yrs and I can't still seem to believe what I put myself thru! Despite issues, I really wanted to be w/ him and have a future n it hurts so bad for him to flip the script on me and mislead me like that for someone who is a christian. I have done nothing wrong, so why should I be the victim? Was he right to do what he did ? I am still confused and pissed off! I havent been dating ever since and my life has been miserable and boring. I just need some advice on how to get over this situation b/c it's bothering me so much.