@glass half full - I can see how frustrating it would be to see a sufferer try to do the thinking and feeling for a supporter, and vice versa. He will have his reaction to the trauma and you will have yours.
Your sufferer shared deep details with you and then shut you out without much explaination. I can see how much you want him to know you are ok with this and he doesn't need to run to protect you.
I do not want him to believe he needs to spare me gory details when in fact he needs to spare himself. I want him to be able to acknowledge that his motive is to spare himself.
You hurt because he hurts, right? Being let into the depth of what he saw, what his deep pain would be about, would naturally make him worried you would hurt as deeply as him.
I think it's hard for some sufferers to know that a supporter could have a different response.
I think is maybe hard for some supporters to understand is the self loathing many sufferers feel, because supporters don't often hate us or feel disgusted by our pain - at least not to the same level that we feel about ourselves.
Trauma often sends the message the victim is a bad person. It send this message with life and death levels of power. Sharing, even in therapy, can stir up symptoms. Validation from a supporter is a good thing, and it can come with a very unfair cost. It can lead to the self proective wall of denial melting and the sufferer facing the full force of the pain they have been running from.
And the pain the sufferer is in can oversleep all their abilities to cope with it and sustain any relational or emotional connection.
Shut outs are not always about preservation of the self, but yes, that can be a big competent of it for some people. Is it healthy? Sometimes yes, often it isn't. Sometimes it's the bet a sufferer is able to do in that moment with the skills they currently have.
Take someone who is suffering from cancer, and going through chemo. They may want to climb mountains, they may know that it hurts others that they can't climb mountains . But, it doesn't mean that they can just decide to face the pain and go climb that mountain. Instead, they do what they can to survive the pain and set a different goal - perhaps a walk around the block or even just an effort to stand up.
I think it's easier to understand the cancer patient who can't climb a mountain, than it is to understand the PTSD sufferer who can't maintain emotional intimacy or connection.
@glass half full - Your sufferer has left with little dialogue and no end in sight. He is the only one who can say why he has done it and what he is thinking and feeling. It is hard when someone doesn't say, because that's the only way to know.
Ps - Edited to add: I tried to unbold to quote your post and it wouldn't let me from my phone to bold or unbold. I believe your holding the post wasn't intentional. :)