I go through the same thing on occasion with my bf. We're so ridiculously close, but sometimes fights just happen for no reason at all! But it really is all about making the other person feel special & wanted... Even if you're feeling a little disconnected? You have to put the focus on the other person because they can't give back if they're in the same state you are. So, sometimes it's best to give first & take later... Hopefully you'll both find your way out of this pit together!
Though I must agree... It is very worrying that he stopped all of his treatment & that you're going off of your AD. Both of those could be causing a significant amount of inner stress that is probably making its way outside?