Well ain't that a load of shit...
I had the something very similar happen to me in high school. A bunch of kids (not jocks/preppies in my case) were spreading rumors about how I was going to come and shoot up the school. The big difference is I *almost* had it coming to me and I didn't get expelled. I kept a list of my friends on my webpage and gave them points every time they did or said something stupid in my presence. Eventually, the most paranoid kid in school (who was not a friend, and therefore was not on the list) found out about it and ratted me out to the principal. I think you can imagine the big shit-storm that followed. Even though I didn't get out unscathed, you still got it much worse than I did - especially since you didn't actually do anything. I think the best thing to do is to try to continue on as normally as possible and find peace in the fact that you, your friends, and your family know that you're not evil.
Anyway, I think I’ve rambled on long enough. I hope everything turns out for the best, and may Bob be with you to watch over you and to guide you through these trying times.
-JT