I hope he reads what you posted. These things don't just happen overnight... the walls get built brick by brick. The snowball accumulates flake by flake.
I agree with what you said about the nail in the coffin. OTOH he does seem willing to look at and hear what he's doing wrong. He's not necessarily just looking for ways that his W is wrong.
I also consider myself HD, but the feeling of being rejected over and over again and his lack of interest is getting me to the point where the thought of having sex with my bf is feeling distasteful... I can't remember what I like about sex. I mean, I have specific memories, but I can't "feel" the memories. It just sounds like a lot of trouble leading to disappointment.