I fight a losing battle with the same thing. My H and I talk everyday and there is ALWAYS R talk. I just can't seem to help it either. For me, its that there is no resolution. We are S and I don't know if he is coming home, staying where he is or ending up with the OW, so its really hard for me to talk about other stuff when my life is stuck in idle.
If I knew he was coming home, I could move one. If I knew he wasn't, I could move on. Waiting for the other shoe to drop is hell and makes DB'ing a total nightmare. So to make a long answer short. I too struggle with the non-relationship thing.
Your H will "get over" the OW, he just needs time to not only mourn the relationship, but he is probably feeling sorry for himself and kicking himself at the same time. He will need to work out his feelings in his own way/time. Just keep doing what you are doing, as it seems to be working.
M:39 H:39 K:S14;D8 T:22yr M:15yrs S:12/28/07 EA/PA 3/14/08 OW preg 11/17/08 born 12/12/08 his ~~~~~~~ Never allow someone to be your priority while allowing yourself to be their option