Wow...that was...that was heart wrenching. Dear, I am so sorry for what you have been through. I started to choke up a little bit. It's terrible to see a nice kid such as yourself get bullied just because of your condition. But honey, kids your age and younger just don't understand. They aren't mature enough to say, "Oh, it seems like she's down...why don't we cheer her up?"
I don't know if this helps, but, if I were your age and with you in school I would be your friend. I always look out for the underdogs. And if you ever need someone to talk to, I'll be here. I'm always willing to extend my hand and do the best I can to help. I know I helped a few people out of depression, so maybe I can help you too.