I had planned to travel back home for mine last year but in the end it got cancelled.
I was neither popluar or unpopular, just the middle person floating between groups, although there were some fights and things throughout the years we actually had a pretty good class, everyone knew everyone and generally got along.
Since school people have fallen out and things but i think most people are all friends on FB now, keeping tabs on each other and seeing who has kids etc.

I was shattered it was cancelled and a few of us keep saying we should organise our own little thing and see who can make it, we just haven't gotten around to it yet.

If it's going to bring up bad memories then i wouldn't go but if you think you can gain something out of it, show people who you have become despite their rude and horrible behavior, i'm sure you have much to be proud of.