A friend and I talked today, about the difference between hub's combat PTSD, and mine (which basically comes from childhood rubbish).
I mentioned that I'm generally a lot more open and upfront about it than he is, and we wondered whether it may have to do with the fact that not only did he choose to put himself into a situation where he was liable to experience the trauma, he looked on the whole thing as being an adventure (admittedly, he was young, and this was at a point when war wasn't that likely, generally speaking).
We also wondered whether it has to do with the simple fact that for me, it stems purely from things that were done to me - that I'm not responsible for. Whereas some of hub's has to do with things he did, or was responsible for.
I've also noticed that his reactions (I imagine from years of instinct training) tend towards being more aggressive, or violent - mine tend more towards childish hiding behind things, or teenage style uber-tantrums. Also he clams up, I act out.
How I cope - well, sometimes I don't. Sometimes I completely melt down (though at least in part that's down to my own problems). Other times, by talking to friends - by having my own places that I go to, in which he plays no part (be that real or online).
The hardest lesson was not to ever take anything personally, because if he was being horrible or cold and shut down (and he really really can be both), it wasn't about me. Which is not to say learning to accept everything - you have to have definite boundaries. Also, learning not to walk on those dreadful destructive eggshells around him. Second hardest. Treating him as I would normally. Keeping things 'normal'. or as normal as they ever were - not changing everything just to fit around him and his mood swings, but to treat him like I always did. At the same time trying to keep things at home calm. Or at least safe. And not judging him. Home is where he comes and he's safe, where he can be fully himself, he doesn't have to lie about anything to protect himself, and he'll never ever be judged for things he's seen and done.
I fail at this regularly - I frequently get heavily on his nerves by asking constantly if he's ok, but that's about my stuff. I also always point it out if he starts shutting me out. He does this without realising he's doing it sometimes, and he sometimes does it to try to protect me from whatever's happening with him.
I've also wondered how much of the difference is not just down to the different roots, but to the male / female social conditioning - boys don't cry or talk about feelings, girls do.
Things that I do to try to help him - I actively encourage his hobbies, I bully him into seeing his friends and going away with them every so often, I cajole him to go for walks and do something physical, I nag him to phone his family, if he;s acting like an idiot about something I tell him so. I encourage him to watch war films and action films without me (it soothes him, they frequently, depending on the film, freak me out completely).