Something else that might be important: He has pretty much cut off contact with all his other friends and barely even speaks to his parents. There is one guy in particular that I think has been a very good friend to him, but H won't return his calls or emails. This friend just found out that he and his wife are expecting their 2nd child, but H hasn't even called/written to congratulate him.
H's dad's birthday was in July and all Dad wanted was to spend the day at the gun range with H, but H wouldn't go.
Also, though his parents know we were talking about divorce and were going to counseling, I don't think they have a clue about OW.