What works for me may not work for you but I'll share my experiences. After 10 years of being married to my wife with PTSD, I'm now at a very bad place best referred to as frustration, resignation, and sadness. If I could go back in time, I would have gotten here sooner to learn better coping skills and also have BOTH of us in counseling. Like your husband, I am hurt and have emotionally "checked out" to see what happens. My sufferers psychologist is working non-stop to give her coping skills to manage her PTSD.
In my case, my wife asked how she could win my trust back. I told her that I would like to hear more "I feel...." rather than "you did....." Its a start. Will this work for me? I don't know. If I didn't see a little flicker of hope and determination in her eyes, I'd be gone. (She did leave once but thought better of it and I didn't have the heart to leave her homeless.) I'm working with a therapist that helps me.
Will it work for you? I don't know. Probably largely depends on how bad you both want it. I'm not smart enough to have all the answers but I honestly hope you and your husband find yours.
Take care.