I am soooooooo happy for you. You passed a major barrier here. Strike while the iron is hot and see him again. Just be careful not emotionally depleting your friend, especially if he has no experience dealing with PTSD people. Next time, do something "light" together if you can and be methodical in learning what works for you.
Finally, and this is NOT directed towards you or anyone, but just a general sense. KEEP emotional-sexual integrity towards your friends. Vulnerability and emotional attachment can often send out signals of other kinds of cravings as well to those who do not know. This happens a lot and most of the time, it is NOT anyone taking advantage of emotional weakness, but just human chemistry, but avoid it for the better future of yourself.
Again, this is a MAJOR achievement from your side and something to build upon. Very much the best and I hope I can get there at some time. I have several friends that have started really wondering what is up with me and my avoidance and "the news" is not out yet, neither with my patients nor friends or family, but it will be soon.