I once cheated on a guy I was seeing years and years ago when I was 15. Horrible, horrible breakup. The pain on his face was so unbearable to see, that I have never thought about cheating ever again.
I firmly, firmly believe that if the cheater really understands why it's wrong, the consequences and repercussions of their actions and what they should have done instead, and what they will do in the future to avoid hurting people, and communicating with their partner then they wont re-offend. I certainly will not.
Dump his *** and maybe if he's got half a brain he'll be able to realize he was wrong to hurt you and learn like I did.