As the title says, there's a guy I met for five minutes several months ago who won't stop messaging me on Facebook. We're both (straight) guys, so it's not romantic, he just seems to want to shoot the breeze. I'm not a fan of small talk, and online even less so. I've tried ignoring his messages, but he doesn't stop and every time he messages me and I ignore him I feel guilty (more on that in a second).
I was hoping if I talked with him for a little while, he'd stop for a while, but when I tried that he just messaged me again the very next day. Part of the reason I suspect this is an issue is that I know he has something like Asperger's, so I don't think he would take a hint if I just started giving him short, curt responses. But I don't want to be super blatant/rude about it and say "I don't want to talk to you".
My sister knows his sister quite well, and my sister said he doesn't get out much or have many friends, so that's probably why he tries to talk to me. I guess he sees me as a friend even though, as I said, the only reason I even remember him from the five minutes I talked to him is that he found me and sent me a FB friend request.
I guess I wouldn't mind so much if we had anything at all in common, but we don't. He'll see something I posted on Facebook and message me about it, but if I respond he'll just talk about his work which doesn't interest me.