When I run into such people, I kind of treat them like strangers. I try not to be overly friendly or go out of my way to avoid them, nor do I confront them. Well, with one exception (that was fun).

I certainly wouldn't have invited them to my wedding. You don't owe them that honor. Myself, I'd try to move on, find people who treat me respectfully.

Oddly enough, I did end up in a situation where a girl who used to torment me until one day I chased her down when I saw her without her circle of friends and confronted her *basking in the glory of that moment* and saw the real her, the whimpering, cowering girl who bullied me because of her own insecurities, she never bullied me again and when we ended up with the same mutual friend later on and ran into each other we didn't exactly become friends, but were able to be mutually respectful.

Good luck with them and remember, you're not the one with the issue, they are.