If it is PTSD related, it's not so much that he is refusing to let you get close, any more than a cancer patient exhausted from side effects is refusing to run 26 miles. A sprint of closeness, sure. Easily doable. But extended closeness is hard when PTSD symptoms are strong because sometimes there isn't anything left inside. Being close is scary, especially when someone is safe, because trauma usually came at the hands of humans. Close is being vulnerable to getting hurt and when the PTSD stress cup is already full, sometimes there is no more room.
I often feel this. I want to be close, but I can't because all my energy is zapped by fighting the PTSD.
Pacing is important. It's like building up a muscle. It's not because of you, but that vulnerability and closeness is scary. It's almost like how exposed therapy works. The exposure has to be built up to be stronger every time, and not jump right to the most scary thing. In relationships the fear can be delayed, and it's not usually about the other current partner, but the past trauma that's being stirred up by being so close and risking being so vulnerable.
People without trauma at the hands of humans find safety and comfort in human connection. People who have been traumatized by humans do not easily find that same safety and comfort, not in the same way. It takes a lot longer to build it up. It is possible, and tough.
The more you and him can pace out and gradually build up closeness the more he will build up the ability to sustain closeness. It's like a marathon, at a turtle's pace, to build up the relationship in a sustaining way.
I usually want to dive in myself and it's great, I can do it for days on end. My partner and I enjoy it. Then, it's like BAM. I hit this wall and I shut down and I can not be close like I want to be, so badly, and it's a very painful place for me. It is so lonely, and I will want to connect, but I can't. I know it's also hard for the people I shut down with.
I avoid hitting that wall and shutting down by pacing even when I don't want to, and by processing the old trauma in therapy too.
I've been on both sides of the shut out, and it's really tough. My heart goes out to you and him both. :hug: