What's wrong with me? I mean, besides the whole peanut thing...

I really hated myself for a while.
Whenever I mentioned my allergies at school people would groan and roll their eyes and ask me if I could please just drop it, just stop, why did I keep doing this? Whenever I got up and left a classroom the teacher would ask me if it was really necessary and the whole class would start whispering about me. Not to mention the death threats and the teasing and the way people liked to shout "PEANUT!" as I passed in the hallway.
There was this one day, about three weeks before I left school, that made me so mad I literally did see red. Poodleface and I were going to lunch along with a third of the school. Everyone, myself included, was wearing a really heavy backpack because the school issued us laptops, and backpacks to go with those laptops, and we were required to use them so that the laptops would stay protected. But the bottom of the bag was reinforced and wouldn't bend and was too big to fit in a locker, so we had to carry them everywhere for the whole day. There was also a rule that said that we couldn't take them into the cafeteria, so we tossed them in a pile at the door, which pissed the teachers off but it wasn't like we had a choice. At the beginning of the year someone had figured out that if you grabbed the handle of someone's backpack and gave it a light tug it would overbalance them and they would fall over. When I first felt my center of gravity shift dramatically backwards that's what I thought was happening, but the boy who'd yanked my bag caught me before I fell. So there I was, in his arms, unable to see who it was because he was behind me, wondering what the hell he was doing and why he was holding me so gently. We stood like that for a few seconds, and then he leaned forward and whispered in my ear, "peanut." Then he set me back on my feet and when I turned around he was gone, thus completing the most intimate insult I have ever gotten.
What really pissed me off is that no other boy had ever held me like that. Other girls who share my social standing get sexually harassed, but all anyone ever shouted at me was "peanut." I wasn't even a girl anymore, they hated me so much.
They hated me for being allergic to peanuts, and they acted like I was doing it deliberately and they wished I'd just stop.
So why didn't I stop? Why didn't I just stop it? I wanted to stop, I really did. I wanted to cry and lay  on the ground and say I was sorry, I was really sorry, I hadn't meant to do it, it just happened, I couldn't stop it, I was so, so sorry and I understood that they hated me and wanted to hurt me, I hated myself too.
I left school because my only other alternative was to start harming myself.