I've never been in private school, always public. Good luck, dude. I don't know what it would be like to go from private to public, but hopefully it's not too bad? (:
That sucks. I couldn't imagine going back to public. It would be horrible. I've been in private school for about a decade now. I was seven or eight when I went in. Going back would be like hell. I know for a fact that certain people hate me too. But anyways good luck I'm sure it won't be too bad. You were only out three years.
A lot happens in three years so I'm sure you'll be fine.