My boyfriend hasn't had sex with me in ten years. It was him not wanting to in the beginning, but my OCD's gotten so much worse, that I don't want to, anyway (meaning, I don't want to touch him, because that bugs my OCD so much; it's not that I don't desire sex and touch).

I don't recommend cheating. If you're not happy in your marriage, you need to communicate, and if he won't listen, you have to decide if you're going to live with it, or divorce him. Dissatisfaction in a relationship is not an excuse to cheat. Believe me, I understand how you're feeling, because I ache for a sexual and loving relationship, too.

Aside from that, I basically agree with what the others have said. I think you're letting him treat you this way. He cheated three times! He doesn't value your relationship.