Please know that you aren't alone in what is happening and how you are feeling. My H's affair was the most painful experience of my life and I had no idea that it was humanly possible to feel such pain.
I think things are a little different when the OP ends the relationship instead of your spouse. My H's OW decided it was over and told him that if he came over to her house she was going to get a restraining order. So my H didn't want the relationship to end and was "dumped." I know that he is mourning the loss of this person that he believed that he was in love with. I would bet your H is doing the same. My H also isn't repentent and really hasn't even said he was sorry.
I know it is difficult, but it sounds like you are doing well.
Keep working on it.
sara
Me-31 H-38 M: 5 yrs T: 7 yrs No kids Went to Prostitutes 10-1-06 Found out about OW 12-24-07 Bomb on EA/PA: 1-2-08 OW ended it with H "for good" 3-8-08 OW is back 4-19-08 H and OW tell me that they are in love 5-19-08 Filed for divorce 6-5-08 Divorced 7-2-08