A quick Ques...i might go mental!!?

So my family has been driving me insane ever since i turned14. Im16 now. Im not allowed to do anything, literally every weekend im in my room or watching tv. My mom wants me to learnto cook, but i didnt want to but now she is like "forcing" me. I am trying really hard to do well in school so i can be a lawyer. I have developed migrains, anxiety, u name it. I have so many problems that i wouldnt even think about telling anyone. I feel sp isloated and sort of am going crazy. My biggest pet peev is when someone is ist and makes me feel i cant do anything cuz im a girl. My lazy *** bro does nothin all day but is considered an angel:( ( cuz he's a guy...) my heart hurts amd i ask god everyday y he made me a girl. I do better in school than my bro, im better at everything. But still he gets spwcial treatments. I wanna move out at 18...my ffamily will hate me even more. If i move out i might be at peace but i will feel guilty! I always feel like crying. I have so much anger inside. How can i realese it and be happy? I dont wanna accept there ist attitudes.