I am going through some old posts to tie up loose ends, and want to add an addendum to this one.
When I posted this, I was in a horrible state (probably obvious). I said some things I am sorry I said, though they were true at the time. I want to put an update here, both for the sake of my own integrity and for anyone who may be reading this because they are going through a similar situation.
We really did resolve this problem, with a lot of work on both our parts. Even when things are this badly broken, where there is mutual willingness, there is hope. Is it perfect? Not really. I can still be triggered in major ways, and he is still not as consistent as I would like. But he has made a huge effort, worked on the issues that were getting in the way, fixes things each time he slips up, and is doing much better at accommodating my needs. I know that whatever comes up, we will work it out, and that is gradually expanding to trust more in other areas of my life.
I have trust issues because of a long history going back decades. Through working on this issue with my therapist, I am gradually learning how to trust again. He's a good guy, and there is hope.