School is a tough environment for everyone. It's not just you, please don't think its just you or that the world is picking on you. School is harsh on everybody.
I was faily passive at school, but wasn't afraid to get into a fight either. Me and my brother fought like cats and dogs, and I got angry quick. I learned that the tough guys, the bullies were were just bored brainless so would entertain themselves by picking on someone. I fought back swinging, I actualy made some friends that way.
I didn't hold a grudge. If they hastled me I'd hastle them back. If they taunted me, I'd take the bait. They'd often be surprised just how agressive I was. But afterward, I'd say Hi and they'd say Hi. Worked for me 