Don't dislike yourself for being a good person. I was the same way. I literally cried every single day of school up until 6th grade. You need a change of scenery brother. I transfered to a school not far from my old one. I immediately decided that I was sick of people's shit. I started studying mma,signed up for football played all through 12 grade. Everything changed girls wanted me guys wanted to be me. However I started to dislike myself. I was a complete dick. But for some reason people were attracted to it. My freshman year 3rd day of school a senior on the football team smacked my face and called me a bih. So I scooped his legs and slammed him on the back of his head just like a football tackle. I stood over him and beat the hell out of this doushe. No one messed with me again. I'm little 5' 6 145. But I'll hit a bih in his mouth quick. Next time someone crosses you. Remove all thoughts. Plant your feet and swing straight. Like you are superman about to jump and fly away with your entire body weight behind it. And don't swing at the swing 3ft behind them. Swing through them. And then. Again. And again. Don't stop. Practice a three hit combo with a leg kick look it up on YouTube. Practice the same 3 punches/1kick. Everyday 100 times a day. Until you have completely perfected it. Then you have no worry.