This is kinda what Ronin is saying... and I'm not sure I can make this come out right... but when people don't understand stuff like dealing with PTSD, or what it's like to have a special needs daughter... I'm kinda happy for them. Like, I'm not wishing my problems on anyone... because this stuff is HARD TO DEAL WITH. I love, love, love my daughter, but she's a full time job for my husband and I, and has been for 15 years and will be indefinitely. Do I want other people to experience that? Not really. And PTSD and the trauma that caused it... I don't wish that on anyone.
So... remembering this gives me patience with people. Because, in a way, it's okay, even good, that they don't understand. Good that they're lives have been easier. And once you have the patience... then it's easier to get into the information and advocating. I agree with Ronin, too, about having a couple websites that explain things. Explain how there are hundreds of people on this site, experiencing the same things, and how their loved ones don't always understand either... that you're not alone... but neither is your boyfriend alone in not understanding (yet). And that if he could gain a little understanding about PTSD specifically, it would go a long, long way to making things easier for the two of you.
I hope this helps,
D