Im a bit confused over the PTSD issue. Does he have it or not? It might be me being a bit thick, so appologies in advance if it is! lol
I think the cold, honest truth is that if he is stuck on the idea that there is nothing wrong and that he doesnt need to change, then he wont. A person can only change properly if they can see a reason for it. Have you talked about marriage councilling with him? Has he any official medical diagnoses? (Such as depression etc...) and if so, does he take any medications or do any therapy to help them?