SF so sorry not to have been on your thread until now I have just caught up and think you've had a lot of breakthroughs.
I can't even begin to give any advice on PTSD but I do think he sounds like my H with the processing. Once we had a massive talk about me wanting him back and him dating another girl and that night he told me he went to bed at like 5pm and slept the whole night through. Processing. I think some men will have a conversation or an event whether that's with you, the counselor, or the kids, then need to go away and think about it with no outside input.
Rather than hoping the thoughts are positive towards you guys instead just think and hope that he is healing and getting clearer in his thoughts. He sounds hurt, confused, and conflicted.
oh my H used to say the same thing about me not doing things on my own however if you won't feel comfortable don't go. Do something else on your own. Take the kids out somewhere, someplace you've always wanted to go.