This is tough because you have to figure out what to do for yourself but I can tell you how I have survived. But my relationship has lasted 2 years and we are not married, living together and only see each other 2 times a week. Sometimes I or both of us need that break in between. He is also an Alcoholic and has been sober 30 years.
Our's started out great with lots of affection, going out and doing lots of things together and then it stopped. He seemed to be getting more depressed. I found this forum and learned a lot about his PTSD. I also started going to Al Anon. I think the principles of Al Anon could apply to all the supporters of PTSD sufferers also. Take Care of Yourself first!!!! You can't control the other person/spouse, etc. You can't fix them!!! They can only fix themselves. Al Anon has helped me find some peace more than anything when I was coming unglued. I can only find serenity and have the energy to take care of my life. My Vet has to make the choice to get the help he needs and work on his life and then we can work on our life as a couple. It definitely has been a roller coaster ride.
Find yourself again by doing things you like again. Take care of yourself physically and mentally. Try and keep the focus on you and not him. It takes time. Lots of time. Just day by day.