Hm, I do not know your situation too much. I would normally tell someone they're thinking too much on something, but you came on these forums. I've read some posts and from what I've gathered, there are a lot of us who need professional therapy(Including myself.)
I'm sorry to hear you are having problems. If he is anything like me, he probably has no idea! I wish I would have gotten a verbal warning, or a separation before just killing the relationship. I don't know if I'm the kind of man who likes to change. I did love that woman, but after what she's done.. all of our happy memories together are overshadowed by her betrayal.