I want to move states away but my family is holding me back

(warning I'm bad at writing and rambled) I (almost 21f) currently live with my mom and bf and on the same street is my mammaw papaw a kid they have custody over and my uncle and my uncle's roommate/gf/friend idk anymore . My bf is originally from like six states away and moved in when he turned 18 witch I found out my mom only agreed to because she was worried I'd run off states away for a boy in her words(our family has a track record). But almost 3 years later of him living to here they still get upset and "get worried he's gonna take me and run off with me" and I hadn't talked about it before but after getting in a too high auto payment i am working on fixing now but it opened my eyes to somethings. I do groceries and a loan weekly it totallys 450 I have to spend between the 3 I get usually 500 and I do 60 monthly for Internet. My boyfriend has had some issues with his birth certificate and drivers license is expired so we're working on that but my mom who has same job as me pays our lights sometimes water sometimes mammaw does it and vehicle insurance most she'll have to pay in one week is 375 lowest is 0 on zero week or weeks depending on water she said she'd do groceries yet when it came time she only had 75 when usually we need 200 so we had to work with just sandwiches. We all keep borrowing from each other constantly for nessesitys it's unhealthy. And on top of money problems she puts her nose in ever private conversation and before when we went out to eat if we didn't bring her food back she be pissed at me like "I see how it is" she a great mom she was a fun but stern about safty and stuff . She want alone time and to live alone but if we talk about a apartment she talks about if we'll make it take care of the place and about use leaving her alone etc. and in my bf home State we have friends he has more(I don't have any social anxiety we only got 2 and they to busy to hang out at all) he has family he misses and honestly looks a whole lot better but I worry. My family would be upset thinking I choosed him over them my mammaw and papaw could pass(especially papaw he's lived past experimental treatment expectency for a type of cancer) and if they do pass the child in there care a real bad hellion in my opinion would go to my mom's care and I know my family probably won't help her they don't help my mamaw with the child now and my uncle's a slease and unreasonable. How do I go about wanting to move away