I need to move out, please help.

Okay, so I live with my dad and stepmom, and my 8 year old brother...they’re good parents to my little brother, but to me, they’re not...I’m 17, will be 18 in November. I’ve been counting down the days until I turn 18 because I’ve planned on moving out the day I turn 18. My dad and I have never got along, and I’ve had a job since I was 16, and ever since I got that job, I’ve been expected to buy everything I need myself, and if my dad or stepmom buys something for me, I’m expected to pay them back. So I’ve already pretty much been financially supporting myself. I’ve been with my boyfriend for almost 2 years, and his family has treated me so much better than my own ever has, to a point where I’d rather be around their family than my own. It’s gotten to a point where living in this house is actually affecting my mental health really bad... my boyfriends mom already told me that she is gonna start getting a room ready for me at her house, for when I can move out...but I don’t think I can wait another 6 months...I’m treated like absolute crap in my own home, and I really don’t know how much more of it I can deal with...so I guess the whole point of this is does anyone have any tips? Any ways I can legally get out before I turn 18? I’m not getting physically abused, so I’m just scared that if I take this to the police or something, they won’t even consider it. But I have a safe place to move to, where i will be supported and fed and taken care of. I work for my boyfriends family’s restaurant, so I have a stable job, and I’m saving up for a car, but my boyfriend’s family will also help me with transportation and everything..

*I live in Pennsylvania if that matters*

*Also, PLEASE no hate. I’m not looking to be belittled about this, I have my mind made up, i just need help knowing what to do.*