I'm so depressed. I want to transfer schools but I'm not sure how to ask. Please help...?

[Forrest]

I go to a private school, and I hate it. There's so many stupid rules! When it's below freezing we still can't wear pants or a thick jacket. We have to wear a stupid skirt or shorts and can't wear thermals on our legs. We have to wear a thin pullover hoodie. There is NO way to express our individuality, we have to wear "neutral colored" shoes and socks. No hats, or gloves. We have to do this program called reading plus, which is a never-ending nightmare. The work is so hard (although I do get mostly A's) I can't handle it. The teachers ask me why I hate reading, there's their answer. I have no time. We have no free dress days. Spirit week around once every two years, and they're even strict there. If it doesn't look like we're showing spirit for that certain day we have to borrow a uniform from the health room. Most of the kids are super mean, and there's a group of boys (yes, they're boys that pick on me and im a girl) that always pick on me when I ride the bus. They laugh at anything I say and are just so mean they make me want to die. My "friends" dont care about me. I'm really clumsy and dont pay attention to my surroundings. So once I was almost hit by a bus and my friends told me that someone posted it on facebook. So I gave them my phone to look for it, and they kept laughing (along with the boys in the bus), and everytime they said they found it they closed the page and deleted my history, they had me crying and still laughed. Later that day they told me that everything was a lie. So I assumed that they were lying to me just to play games on my iPhone for the whole bus ride. Then the next day they acted as if nothing happened. My old friends would never, ever do that. My family can barely pay the tuition. It's far away from where I live, so my mom's always late for work. It's a Christian school, and I'm an atheist. But the reading plus is what REALLY stresses me out. Sometimes I cry myself to sleep thinking I'll never be free.... I can't live with all this stress. I feel like I have nothing to live for.
I want to transfer to a public school next year in 8th grade, but the thing is, my mom really looks down upon public schools she's always talking how she's happy I don't go to one. She wants me to get into a good college and all, but needs to understand that I am not happy in my current situation. I've been showing some of my depression lately by crying about it to her and complaining about the work and rules to try and give her hints. It's not working. She just says "well, you have to just do it" or "that's how life is, you have to do things you don't wanna do" OR "well, that's how it is when you go to the best school." She even threatens me by saying "you know, the whole reason you have your phone is because you got into that school." It just makes me give up even more hope... And my cousins go to the same chain of schools but in a different state, so, I'll be letting some people down. But I just don't like my school. I hate it. So much. I know what it's like to go to a public school (I've gone to one all elementary). And I think it's where I truly belong. All of my old friends who care about me go there. It's a few blocks away from where I live. No unpractical programs (reading plus). And please don't tell me to suck it up, or just pull through, or "your mom is right and she just cares about you," because I'm really depressed. Seriously. It's the worst feeling in the world. It's a never-ending nightmare. And the sadness keeps building up. I can't even sleep... So please. Help me... Please.