I hate my life? Please help?

I just hate my family: My mom and my brother always gang together and blame everything on me. My mom treats me like shxt and no matter how hard I try to make her feel proud of me, straight A's, all honors, hundreds on tests, she never seems to give a fxck. She hits me for no reason, for stuff my brother does when she doesn't want to hit him, she blames everything on me. The only people important in my life, I feel, are my 3 year old sister and my dad, who I love with all my heart. The problem is I never see my dad, he's always away on business trips but when he's here, I cherish every moment. He doesn't always take my side, but he listens and helps and I miss him terribly when he's not around. My mom is so mean to me, it's horrible. For example, this morning, I asked if I could go to a neighbor's house to hang out with my friend and then my stupid brother butts in and says "if she can go to her friend's house, I can go to Miguel's house" (miguel is a friend of his)and all I said was "you always go to his house, like everyday" cause HE DOES and he starts hitting me and pushing me (I'm 14, he's 8 so I pushed back but didn't hit him.) He was pushing me against the dinner table and he tried to shove me again but missed and knocked a vase full of my graduation flowers (graduated from middle school a few days ago) and then I got mad because even though my dad couldn't be there, he bought me those flowers and then my mom comes and starts yelling at me, and hit me like three times and I started crying, not really bceause it hurt but because it is so painful to hear her yell at me and hit me and never listen to me. And she shoves some clothes in my hands and screams "FOLD THEM, I DONT WANT TO SEE YOU" and I kinda tripped then, cause I was half blinded by tears and accidentaly ran into her and she yells "WATCH WHERE YOU'RE GOING! DON'T HIT ME!" and so then I decided that I'd had enough and shouted back "IT WAS AN ACCIDENT!" big mistake because she just slapped me and walked away. I just hate her, I want her to die. or better yet, I want to die. I just don't know what to do. She won't look at me without disgust. PLEASE HELP. :'(