Wondering if i should run away?

ok, well first i really cant stand the place im im Living right now. its my mother and my halve brothers and sisters. my mother has started to be as horrible to me as possible to me lately because she has realized that she cant make me do whatever she wants. i wont go to far into details, but i almost killed myself from the constant yelling from 'er that i was no use and should do her a favor by finishing myself off. and i have PTSD. post traumatic stress disorder.im only 14! i have run away before, but...... there was was a problem. it was the middle of DEC. and there was just a blizzard. yep, bad timing i know, but i made it couple miles. if i do run away this time i actually have a plan. i just found a birthday letter from my dad. my mother hid it from me. and i didn't see my dad for a couple years because my mom brainwashed me when when i was younger to think she was i all i had and he was a bad person. i know that now not to be true. anyway on the B day card letter was a return address. he lives semi-close and i now know exactly were he lives. i could semi-easy get there. IKD what my mother would do though. she tells me to run away all the time, and yet at the same time threatens to call me in as a run away. so if i went to my dad's house she'll probably call the Police, just to bitter at me. ok, so should i run away? if so should i go to my dads? there is the option to go to my friends. he said his family did the same thing with his cousin. if anyone thinks i should do that, or what?