I hate school! What should i do?

So last yr i was in first year of secondary school. My brother went to boarding school, (he's in his first yr of college now,) so i was kind of destined to go where he went. I persisted up until about fifth cl that it would be horrible going into those dreary dorms every Sunday night, and that i would go to day school. But i was persuaded. I spent until Christmas crying most Sunday nights and counting down the days until i could go home again. I got home every weekend which isn't too bad. But i still hated it. After Christmas i was happier, because i knew i was half way there. My mom and dad said i only had to stick one year of it and after that i could drop out and go to day school. I love the cles and teachers and my friends, but there are a few really mean people in my year and older years who just love making life misery there, as if its not hard enough as it is. Its non stop constant go there, from when we get up at 7:10 till we got to bed at 9:40p.m. Things get stolen, we have to hoover our dorms every morning, firealarms go off frequently in the middle of the night, and the meals are horrible. We only get 3 meals a day, our last one is at 5:30. I'm vegetarian so i get really run down whilst i'm there, and even the vitamins i take aren't enough. I was planning on going to a local school this year, but my report card came. I got 7 a's and 4 b's. My mom said it was so good there was no way i was going to drop out. I tried saying how hard i found it but she just said it'll take a while to settle in again. But i never settled in, i hate sharing a dorm, i constantly miss home. What should i do?? Should i beg my mom to let me go to a local school? Or does she know best?