My boyfriend got hurt..

My boyfriend used to sell drugs for a gang, and someone crashed a car and blamed him for it, so his boss got really mad and sent someone to hurt or kill him, I'm not sure what his intentions were. So my bf got fucked up quite a bit, and he couldn't fight back because he knew if he did the guy would have ended up killing him for sure. He got cut up by car keys and hit in the head by a hammer, and can't see out of one eye right now. His boss was threatening to go to his house and do worse to him and to his family if need be, so they all went and were staying in a hotel for a few nights, and I went with them because I was helping his mom by looking after him and his younger sister while his mom and dad were going back to their house and packing things since they plan on moving out of there and going somewhere where those guys won't find them. After that his parents decided to pay for me to have a phone plan to always be in contact with him and even offered for me to move with them, since they know my mom kicks me out a lot, and that my dad is out of my life. I would really like to go with them, but I can't for a while since I have a lot of medical issues I'm waiting to get figured out and fixed. I'm only 15, and if me and my boyfriend break up I don't know how things would go, but his family loves me and I love him and all of his family, so I'd really like to go with them. I haven't brought up the subject to my mom yet, and I'm worried she's going to say no. Should I ask about going with them? They said I can move in with them whenever I feel I am ready. Should I even move in with them? I know that even if my boyfriend and I don't work out, he would still be fine with me living there but it's a five or six hour drive away, so if we break up and it's bad I wouldn't be able to just leave, especially since it's a small town they're moving in to. And now that I notice it, this is more of a rant 😅 But still, opinions and thoughts? I'm not really too sure about what I should do.. Help me, please, I'm honestly so stressed about this.

// Adding this.. My mother and I are constantly getting into fights, I tend to be kicked out for a month or so every other week so I barely live with her. She's an abusive drunk and she blames a lot of her problems on me, I've attempted to go onto assisted living (move into a 1 bedroom apartment and have the government pay rent so I can get a job AND finish school without worrying about having a place to live) but I have to wait to be 17 for that. the rest of my family lives either super far, or won't allow me to stay with them and the few 'friends' I've stayed with in the past have been guy friends that try to get me to pay them for it in ways I'm sure you can assume. I have two female friends. One of the girls has VERY strict parents and don't let anyone ever come over. The other lives under very strict catholic rules and I am unreligious, and feel that if I were to stay with her I would offend the family.