I'm thinking about running away, anything I need to know?

Hey, I'm a 14 year old male living in Houston and am thinking about running away. I have elaborated and speculated over this for two months now, and am more positive than ever. I've looked at other situations on Wiki-Answers and Yahoo Answers, and already expect the loads of crap some of you will give me. My Dad loves me, I love him. My Nana(grandmother) loves me, I love her. I'm pretty sure they will miss me a lot. If I leave, my uncle won't give a s#&@, my mom will "miss me", but only yell and scream at me more if I come back home. That is the problem. Because she is 60 years old, she bickers and nags, sceams and yells, then suddenly changes her mood 5 seconds later, saying she is sorry. She is also this way according to how exhausted she is. If she isn't exhausted, she will do this. If she had a bad day, she will take it out on the entire family, mostly me and my dad. If she is exhausted and tired, she is very nice. I could try talking to my dad, but he has no power over her. She makes the money, my dad barely makes any. Also, she is very fat,obese,stout,plump(call it what you will) and old, so she is too f%&@ing lazy to do anything. Instead, I am practically her slave and emotional punchingbag. Whenever she gets home, I'm trying to calm myself down from school, and I MUST get her a drink, food, insulin, and get her crap from the car and move it all to her room. I can understand the insulin, but everything else I think she should at least make an effort to do it. Concerning school, if I dont get an A or a B, it's either grounded, emotional punching bag time, or a huge lecture on "you better do better next time or this might get messy" kind of thing. You know what's even better? THERE'S MORE, but I don't want to put it n here, since you have so much to go through. I can't trust any of my friends, except for a few, to go to. Knowing them, they will probably rat me out. I try and talk to my mom my self, or through my dad, but that only makes the arguments worse. I tried it a few times actually, that being during the two months I thought about running away. I read about the cops catching me and what not, and breaking the trust between me and my parents, but I know my dad will understand, he went through the thought of suicide, and some other stuff. If my mom doesn't trust me, hell if I care, she calls me a liar everytime I do something "wrong" which is like not doing something that benefits her, and not knowing some material for a quiz, on courses I have A's in. My friends love me, and my school is the best community I could ever be in. I understand that running away might ruin my social life, but I don't care. If it means getting away from the person I loathe, than so be it...