I just went back and read your post where you described the letter he sent to you. You said you felt like he was saying that he was done -- did he say that explicitly or could you have been mindreading? The fact that he reached out for a reaction to his letter suggests me that he is not done. In my mind, as long as he cares about how you're feeling, the door is open, at least a little bit, even if he doesn't realize it.
I'm even newer at this than you are, though. It is hard because my WAH is a "nice guy" and I wonder sometimes how much of our positive interactions stem from guilt on his part rather than love or a genuine desire to reconcile. But, regardless of the intention, the interaction itself gives me an opportunity to build trust and keeps the door open.
