I agree with T2S...I was gonna say 'catfishing'...but then I was more concerned about his being ASPD....has he been dx? Did he tell you he was?
People with ASPD are not just 'distant'...there is a forum here regarding them, so you might want to check it out. And I'm also concerned that you fall so hard and that, according to you, they have your heart until they break it or/and
you find someone else. That's a huge red flag, darlin....don't get me wrong, I've done that too....was a lot younger than I am now, but it seemed the best way to get over a break up...the old, 'if you can't be with the one you love, love the one your with' but it is a very unhealthy and painful way to stop one relationship, and almost ALWAYS you'll find yourself in another relationship as bad or worse than the one you left. Because you're not emotionally stable enough to HAVE another relationship.
First, if you haven't seen him (skype, or other video forum) then I suggest you do. Nothing like seeing the man you believe in your heart you love, moving and talking. Sometimes it changes everything. Sometimes it solidifies everything. In any case, don't trust a picture. That's static and as T2S pointed out...pic's can lie.
Second...if you haven't seen a counsellor, I strongly suggest you do. Not to talk you out of this relationship, but to help you figure out exactly what you're DOING in this relationship.......and to get a better, more objective opinion of where YOU are in this. I'm worried for you....
Please take care!