Am I allowed to move back to Mississippi legally without getting any trouble or arrested? And can my friend’s mother gets a custody for me?

I am 16 years old and my mom has made me move from Mississippi to Alabama. We have been here 2 weeks and I'm miserable. I'm like a slave I have to clean everything with one meal a day, if I'm lucky to my younger brother is allowed to do everything. I'm constantly being yelled at for not being good enough. I'm punished for my brother’s mistakes. For four years she's kept me like a prisoner. Until I met my friend, we dated for about 7 months but then broke up because he was turning 18. We were still friends for the past year and a half. Until I turned 16 and we have been dating for two months. His family has treated me better than my mother has since I was 11 years old. They have offered for me to move in with them so I didn't have to be here in Alabama. If I go back up there I will have a steady home, I will be continuing the same high school I've gone to since freshman year, I have a job lined up for me. I'll have my own room and it will be my friend, his mother, and his sister who is my age living there too. I've dined extensive research on if this will be legal. Or if they will get in any trouble for taking me. I've explained the whole situation and I would like to know if I can legally without anyone getting in trouble or arrested.