Any advice on what I could do in this situation? I REALLY need some help!?

Well, me and my mom fight all the time. I'm not exardurating, we fight everyday. My boyfriend knows about it and he says that he might tell because it's just getting worse and worse, then I end up practically begging him not to. Is this even considered abuse: saying things like that I should be in a psychiatric mental institution, that I'm stupid, worthless, a b*tch, brat, crazy, and other words; or if she pulls my hair at the bottom of my skulls (I don't know if this gives everyone a head ache but I get horrible headaches and almost through up), grabs me by the back of the neck, slapping, things like that? She's been complaining to alot of people that she works with and to me about this lady at her work that is abusing the girl that she works with by grabbing her arm and pulling her, pinching her, or grabbing her by the back of the neck. She's complaining how this is abuse but she does those things to me. Can it be considered abuse because the other girl is mentalling handicapped and I'm not?? What would happen if someone called socail services on this? Would I be taken away?? Yesterday we were driving somewhere that takes 30mins. or so to get there and we had been driving for about 15 mins. and argueing the whole time. Then I must have pissed her off really bad because we were going 60mph and she slammed on the breaks so the tires left black marks and I wasn't wearing my seatbelt and it was obvious that I wasn't but she did it anyways. When we argue I can't say anything with out getting hurt in some way but if I don't say anything she'll just get more mad that I'm not argueing back. What am I suposed to do?? I've been thinking about running away, but to her that's just giving up on us, like our family. Because, it's just me and my mom and we take care of my grandma. I've went to my boyfriend's house before, his parents picked me up and took me to their house. I told her that I left because I didn't want to keep arguing and that she told me to leave so I did. The next time she tells me to leave I want to but that's giving up to her, I'm so confused on what to do! If anyone has any advice, please tell me! Thanks for taking the time to read this.