I need help. I can't cope with my husbands PTSD anymore and I don't know how to help him?

You can't fix this, and are setting yourself up for failure if you think you can. The only thing you can do is be there for him. Hold him. Let him know that you love him and will always be there for him. You need a therapist or a support group, whichever you can find in your area. These situations are always harder on the loved ones than the actual victims, because we feel like we should be able to fix this. My boyfriend is currently going through this. His method of dealing with it was to find another girlfriend, although he keeps me around for the day to day handling of his life. They will do strange things. The only thing we can do is stand by them and wait for them to work through it. It's tough. But it's what you do when you love someone. This is where the whole for better or worse thing comes in. Find yourself some support, and hand in there. You will both be much stronger when you come out on the other side of this.