Quote: I think I really am delusional to believe we’re actually working on our R. I think H is just happy that I’m taking it so well, and that we are friends.
Those are my sentiments exactly in my own sitch!
The truth is that you don't know, but then there is a good chance that H doesn't know either. H is still there when he had a golden opportunity to leave, you seem to get along well together, you do things together and seem like friends. It is hard to imagine that someone PLANNING on leaving would be at ease with doing those things if he knew for certain he was going to hurt you by leaving.
IMHO H doesn't know which way he is going, so time is on your side. Just keep on doing the things that have brought him closer....