my mom never lets me go anywhere!!!

Don't worry. I know what this is like. I had the same thing happen to me growing up.
Okay, first off, please don't kill yourself! I promise things can and will get better as long as you keep trying to find hope. If you end everything, you could miss out on actually getting the chance to be with someone you love, finding new friends, etc.
The main problem seems to be that as a girl, your mother seems to be WAAAY more protective of you than your brother. It's common in some cultures. (I'm Hispanic. My grandmother didn't let me and my sister at 21 and 24 respectively, spend one hour alone in the house whereas she let her 11, 9, and 6 year old sons stay home alone for hours! Needless to say, my sister and I thought it was stupid.) Now, sometimes parents can seem overly cruel when sometimes they just want to protect you. Instead of keeping you out of trouble, these parents don't realize they're smothering you! I could understand the stress of wanting your own freedom.
I've read your previous posts just now and I say, first of all, tell a teacher what's going on at home. If your mom is hurting you, you need to let someone know and the school is required to tell the law about what's happening. I would suggest calling the Child Protective Services hotline (Pm me for the number and other details, it's no problem.) but I don't know if you'll have privacy to make the call. If not, tell a teacher or the counselor at your school and tell them what's happening, and make sure they don't tell your parents if possible. I don't want you to get in trouble.
Now, forgive me if I'm wrong, but from what you said, I believe you're Christian? In times of trouble, you could always open the bible and try and take comfort in God's words, and don't ever be afraid to ask Him to help you and guide you. Be strong. I know you can be.
(PS, when you go to college, try checking out a martial art class. It does wonders for self esteem. It sounds crazy, but it did a lot for me and my problems post-abuse.)
God bless you, and I'll pray for you to find happiness.

wwwwwwwwwwwwwwwwwoooooooooooooooooooooooooooooooooowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww ur life issssss soooo terrible u sure u tellin the whole story I doubt this I doubt it hard u sound like u come from middle class family so why u complanin idk also u shouldn't be talkin to strangers on your phone and I doubt she would get mad if u were talking about the weather she probs dosent let you hang out with that girl cuz shes bad news ur story is biased I wont belive shes abusive until I hear her side of the story