There is an emotional tie that takes place whenever you're involved in sex with anyone.  Even if it's rape, the emotional tie is one of hatred, contempt, or any range of emotions.  Now, realistically, you should have known there was the very strong possibility it was never going to last.  He was cheating on his wife with you, so he has a cheating personality.  Did you think he would change that for you?  People who cheat with you will very likely cheat on you.  Now, here's the problem, you were cheating too by getting in a relationship with a married man.  So, it seems you both have the same character trait.  This is a recipe for disaster.  I previously had a wife who cheated on me, but I refused to respond in kind.  Beacuse I know that 2 wrongs do not make a right.  It's very hard to maintain the high ground when you feel robbed and hurt, but irregardless it's the best avenue of approach.  Find romance with a single guy, and rebuild your relationship.  And don't be too eager to involve yourself in sex with him.  That is unless you're ready for the emotional let down.  Make sure you love him and he loves you.  If he loves you he will wait.  If you give him sex up front, you'll never know if it's just sexual attraction or if he really cares about you.  And certainly do not trust the words coming out of his mouth.  Men will say anything to get you in bed.  I know, I'm a man.  I am above that now, but it took me years to get to this point.  And only my faith in God helped.