How can I make it easier for someone who cheated on me to talk to me?

I know this question might sound really weird, but I still have a lot of respect for the guy who cheated on me. We are no longer together and haven’t been for more than half a year now. I’m over it. It doesn’t bother me as much as it used to. It’s like he still hasn’t forgiven himself for it, though. What can I do to make it better for him? Is it fair that he still seems to wallow in his guilt, while I’ve moved on from it?