16 and want to move out ?

hey ladies ! i could use some advice right now so please be nice in comments !

my home life has never been well .. my dad is very rude to me. he is mentally abusive and has always been for years. ive been living with him since i was 8 years old because my mum went to jail. im 16 now and my mum has been outta jail for years and is doing well, but she doesnt have her own place yet so i cant live with her. and due to my dad being mentally abusive not only have i developed an eating disorder but i also struggled with self harm for over 4 years. i know 16 years is young and i cant legally move out but i dont know how much longer i can stay here .. my boyfriend is 18 and we ve been together for a little less than a year. weve spoke about moving in together as soon as i turn 18 so i can get outta here and be happy since he has never brought down my self confidence or made me feel guilty for eating or made me wanna continue those bad habits. he truly makes me happy and he has never given up on me, even during our tough times. i have a job and am saving up money for a vehicle, i just turned 16 a few months ago. and IF i did move out, id wait til i was probably 17 because me and my bf would have enough money set aside for an apartment or something like that. i have no where to go and im not sure how much longer i can deal with the stuff at homr. i took my dad to court a few years ago so my grandparents could get custody and the judge said my cuts werent deep enough and told my dad to get me therapy and he only took me once .. so i can't go back to court because i still dont have a place to go other than my bfs. as i said, if i did move out, it would be a year from now or so. but i just dont know how to go about it or if i could since im not 18. i mean, csn they really force me to come back? i just dont wanna get in more trouble if i decide to move out. and if my mum has her own place by then, id probably move in with her and wait to move in with my bf so we can continue to save money for a better home. but who knows what will happen. so .. if you have any recommendations on what to do or what i could do, please comment and help a girl out. thank you !!