Someone I knew in high school that was a pain in my ass for a couple years. I got to graduate with all of my concurrent classes, while he ended up staying another year. But he was a nosy piece of shit, notably when I was dating someone he had. We're talking, no personal space respecting kind, just up in your face and wanting you to do something to him so he'd have a reason to cry about it to someone. What made it worse was he was special ed, so it's like even if we did something non-violent, he'd probably just play that card and get off scot-free.
Sometime after a few years after high school was over, he just died from something. I don't know and I didn't care. Just a matter of 'whatever, I'm still here and he isn't' sort of deal.