I know two guys you can bring as your dates!!
I'll second that!
I would encourage you to go, even for a while. They deserve to see how well you turned out, living well is the best revenge, if your into that sort of thing.
I would, and have, go right up to the worst of them and shake their hand and act genuinly interested in how they are. It will blow their minds, and often that is the one thing the need blown the most.
Plus, you will see people who have totally forgotten about ever existing, and that is cool. Then once you made your rounds, leave and get back to your real life.