MY FAMILY IS SO MEAN TO ME!!!!?

I freaking hate my family! They are so mean to me! My brother always teases me about a whole crap load of things, and when I yell at him to stop or to shut up, my mom and dad yell at ME, when he's the one who started it! My dad always calls me a bi*** and things like that. And whenever I'm in a bad mood, they say I'm PMSing! I feel like crying! I want to run away! What do I do!?!?!