The mystery is solved, and I understand why Terry doesn't want to talk to me.
There is no Sam. Sam was Terry all along. He's an intelligent guy, brutally so, but I knew him when he was clearly having some problems; problems that pushed him to create... a new persona, maybe as a distraction, like a friend of mine suggested.
It's an odd feeling, knowing that the girl you loved wasn't real, or even a girl at all, but it's so far in the past that all I can do is think about it all now. Can't say I'm sad, or surprised, but there you have it.
I doubt you're reading this thread anymore, Terry, but I do wish you the best. I thought I never knew you, and now I know I actually knew you better than most ever will. You're an amazing, intelligent person, and while I wish you could have told me the truth yourself, I understand why you couldn't.