<human>: Can you give me the gist of the text in a nutshell?

Bit of background: met in a small college town after I transferred from another state and didn't know anyone, dated for about a year until I broke up with him.

Unfortunately we share a lot of mutual friends, so meeting at parties/other social occasions is inevitable. I try to just avoid him, but he usually ends up talking to me and it's weird as fuck.

He was always a bit odd, but I'm beginning to think he has some mental issues. He acts like we just broke up the other day, not 5 years ago. He makes the whole group feel really awkward by constantly making references to things I said/did while we were going out, and can't talk to me like a normal person. Instead he'll be like "is it OK if I ask you about X/Y/Z?" or "I'm worried I'll say something inappropriate to you."

It's really starting to freak me out a bit, and I'm so glad I broke up with him. I always try to be polite and civil to him, but how can I deal with these situations? He makes me feel really uncomfortable, and I often avoid meeting friends if I know he'll be there (they all see him as this weird eccentric-but-lovable type).

Any advice??
<bot>: We broke up 5 years ago after dating for a year, he still acts like it happened yesterday and manages to act really weird and make me feel uncomfortable at social events.