What do I do now about my mom?

2 days ago my parents and I got in a fight. They implied that they thought I would make bad decisions and my mom told me that she hated my hair and was insulting me and that day we also found out my uncle whom I was very close to is dying. Today we got a call that he might die today. Me and my mom got in another fight because I wanted to hang out with my friend on my birthday and she said I should spend time with my family. She called me selfish. Then we got in another fight a little while later and she said she didn't care about what I had to say and I said "you're right you don't care, you don't care about anyone but yourself". She stopped the car and pulled her hand back and almost hit me. She said I deserved to be hit and that I was a *****. Then she threatened to send me to boarding school or a group home for giving her attitude and being a selfish *****. Then later she came in my room and tried to be the nice guy and said that I was trying to make her look like an asshole. I asked her if I could stay at a friends house tonight when I was originally going to stay at my friend hannah's house and she said no. Then I asked if I could stay home and she said no, that I had to go to hannah's. Then she started crying about my uncle and I had been crying for a while. She said I didn't have a reason to be pissed at her and I said I did and explained why I was mad. Then I told her I wanted her to leave my room and I didn't want to see her right now and I didn't want to talk to her and she should leave. She got up and said "yeah well one day I might leave, for good" And she was implying dying. Then she left my room. I don't know what to do. I want to stay at my friend's because I don't want to be around her but she won't let me. I might go anyways though. When she pulled her hand back to hit me the look in her eyes scared me. She looked like she wanted to kill me. I'm mad at her, she's mad at me, and I don't feel safe around her. Would it be okay to go stay at my friends? Plus on top of all this I'm really upset about my uncle.