I have PTSD also, and would like to second, third, and fourth the notion that, while it isn't fun to be in a relationship with someone with PTSD, it is even less fun to have it. Truly.
You should have resources available to you through the VA as the spouse of a military member with PTSD. You getting counseling would be great...you'd not only be able to work through your feelings about the trials of dealing with your husband's PTSD, you'd also learn how to better support HIM so his symptoms have less of an effect on your family...both very positive things.
With a quick search, I also located this message board for military spouses, with a whole forum devoted to PTSD. If nothing else, it might help to talk to other military spouses in your situation.
http://militarysos.com/forum/forumdisplay.php?f=117
There ARE resources out there. Call around, find online support, and most of all realize your husband isn't doing anything -to- you to upset you. He's in a world of pain and fear and has no idea how to manage it. Hopefully, if you both get help, you'll emerge on the other side stronger both as individuals and as a couple.