family help! should i move or what!?

i need help or advice or SOMETHING! okay so here the story in a short form. my mom and dad got divorce when i was 7. when i was 10 my dad got married to this women, and when ever my dad is not around she yells at me and my brother. the only people who know is my mom and my brother. and my mom really doesnt have enough money to take care of me AND my brother. my brother is about to move out, so she would only be taking care of me. and so im thinking of telling my dad what goes on when hes not home or around when she yells at me and my brother.

i wish i was like all the other girls who look up to there father and say "your my hero" or "your my bestfriend" but i cant do that anymore. i dont even know what has happened. he gets so mad easily, and has become abusive to my brother, he has a temper problem too.

should i move? or what!
by the way im 13.