Trigger Warning: physical abuse, Trying to leave an abusive family during quarantine

Not sure if I'll get many responses but any advice or perspective will help.

To keep it short I'll give a bit of context:

I'm 20 years old and a college student, and I'm also moved out of my parents house and self supporting (including paying for my own college education).

My parents are abusive and controlling, and I have been the victim of emotional, physical, and financial abuse for several years. As a result I have anxiety and ptsd, and I've been working for the last 2 years to become more and more independent so I don't have to experience that abuse any longer, and I'm almost done but still not there.

Recently about a month ago I had to return to my parents house due to an illness. They were nice enough to pick me up from my apartment (I don't have a car) and let me stay at their house, and I've since repaid them for that. The only reason I went back to them was because my insurance only covered the hospital in my parents' city, therefore making medical care in my city very expensive. I intended on only staying for a week at the most, in order to get better enough to return home. When I asked my parents to bring me back home, they refused, and told me to wait a few weeks and then they'd take me (this was at the start of the quarantine we are all experiencing). After waiting 2 weeks I asked again, and was met with more refusal, and anger, than last time. They called me selfish for wanting to leave and became physically aggressive (threw my computer in attempt to break it, etc for example).

They claim it's too dangerous for me to go back to my apt with my bf (who I would be quarantining with) because where I live is a big city (250,000 people) and that I should stay with them since they are medical professionals who know how to treat this virus. While I understand the danger of this virus, I don't feel safe quarantining with my family, and at this point would be more than willing to pay the extra money for medical care in my city if it meant I didn't have to be with my parents.

My bf is with his family rn, but has expressed how worried he is about me, given this type of abuse has been going on for years, and he and his dad are willing to drive us back to our city so that I can be safe and we can quarantine together. I really want to leave, but the issue is now I'm terrified of leaving, and I'm scared my family will freak out again if I tell them my plans to leave.

Am I selfish for wanting to leave? Should I go through with leaving?

TL/DR: I'm an adult who is stuck with her abusive family in quarantine. I tried to leave to go back to my apt, and they got angry, aggressive, and violent, and prevented me from leaving. My bf is willing to bring me back to my apt, so we can quarantine together in safety, but now I'm terrified of leaving in case it causes more violence and anger.

EDIT: To the person who asked, the reason I was relying on them was because I don't have a car, and my apartment is an hour from my parents house. Public transportation isn't available RN, so my only option was to be driven by someone I knew.

EDIT: Thank you all! I posted this to see if I was really in the wrong by wanting to leave and I'm glad to hear I'm not as crazy as my parents made me feel. Me and my bf will be leaving this weekend while my parents are both at work. I've decided to write a letter to them to let them know I left and thank them for their help. I'm still very nervous to go but ik it will be better for me and since I'm an adult my parents will need to respect my decision.

One thing I forgot to mention in this post was that I asked my sister if she could drive me at one point as well, and she said yes until my mother found out and freaked on her too. My mother told her she wasnt allowed to drive me and that I needed to stay here, which is just wrong since me and my sister are both moved out adults. Idk why my sister listened to her but it doesnt matter much now. All ik is if I had a car I would have left long ago, and I honestly believe that since I don't have one, my parents used that as a way to keep me under their thumbs. And of course that explains why they were so mad about me asking my sister to drive, because that completely undermined their controlling behavior.