Then something is working. Now I think it would be time for GALing, and do it seriously without expectations from him. And continue the 180's. You may need to update them.
I can say from own experience, once I made changes, H did too. And there were plenty of days I felt angry I was carrying all the weight of this relationship, but that's just how it is and I just accepted it. Now, he is making some effort too.
If he picks a fight with you, just look at him and say/ask "What answer can I give you right now to end this fight completely and put you in a good mood? I am not going to do this with you anymore. Do you understand? If you don't want to be happy, then that is your choice. I want to be happy. You and no one is going to stand in the way of that. So right now, what answer do you need from me so you can shut up and be in a good mood?"
Takes some real brass ones on your part....but I'm very curious as to what his reaction would be. And don't say it with an attitude, say it like you are just tired and annoyed and just don't feel like arguing with him anymore....which really is the way you feel, right?
