Abuse Even at 19

I’ve been dealing with abuse all of life from a narcissistic bipolar family member and have been getting the worst of it recently because of how much I speak out against it. It’s not only physical, but mental and emotional as well. It happened again recently after they had triggered me and made me yell. Because of that, they got in my face and then got worse with it. During it all, I had a horrible mental breakdown which I hate having because I only ever have them whenever I abused. As the title says. I am 18, about to be 19 next month but yet this still keeps happening to me and I can’t just leave because I financially support the rest of my family members. It takes a toll on me even worse than it usually should because, well, I have bpd. Yea I know, it’s weird and even talking about it makes ppl uncomfortable. Anyway, I bring it up because despite that, my abusive family member doesn’t care and thinks that my mental breakdowns are just me “crying for attention”. I don’t know what to do. I feel like im going insane and I feel like im crazy. I don’t know what to do anymore