Emancipation: I Need To Get Out! Help Me Get Emancipated

My question involves emancipation laws for the State of: Texas

I(17.5) yrs old... want to be emancipated and move in with two of my brothers who are currently living with me and my parents (I have a 3.42 GPA and am ranked 57 of 565) in my class and have taken all AP courses and i feel that if i stay here at my house for my senior year, I will be oppressed (which i already feel). My brothers are wanting to do the same but are 18 and 20 yrs old. if i petition for emancipation what will i have to prove? and what are my chances?

Pretty much our plans would work but my mom threatens to dis enroll me from my school....( i honestly believe that she is mentally unstable...no joke and possibly bi-polar) so the only reason i would need to be emancipated is to enroll myself back in school and possibly buy a car... Help me plz...