Reliving Traumatic past

IS THERE A WAY OUT?

For the first time ever, I ended up speaking about my traumatic past to a friend a few days ago, (unplanned) which made me realized that in fact it's not a past, and I'm just trying to act cool. It still hurts and it's even more frustrating that I'm not out of it and I can't get out of it and it's never ending. I'm very very exhausted by the thought of that person, I don't wanna be her in sight, I want her away from my life. But I have no power to do this, I feel trapped in a hole. In fact, my whole life feels like a trap with this person in it. She literally raised me from the age of 12, (I'm currently 19) so how is it possible to be out of it, she's seen like my second mum. Being a last born, nobody took me for real and they never will, "she just lacks tolerance, just endure it" that's what they say, while I was slowly running insane and losing myself. Even tho there were signs, my family will rather blame things on me than think that my sister might be doing something wrong. My performances dropped, I quickly went from an excellent kid to an average kid my first few months living with her. I became the kid that doesn't like to eat, even tho my sister is capable of feeding me whatever I wish to eat. I lived everyday of my life, 2017-2021, in constant fear of the person I lived with which is my big sis (firstborn) it was as if i didn't exist before then, those 4 years feels like my whole life span, I'm still living there. I have no memory of who I was before 12. She scares the life out of me. I had to endure everyday telling myself that I'll be fine once I'm out of that place and I did enter university but that doesn't cut it. I thought that would be the end, but here I am again. Moreso, she's just a call away. I'm the girl that hates closing hours during secondary school cos I don't wanna be home, I'm the girl that hates Fridays because we don't go to school on weekends and I'll always be the first one to agreed to a weekend lesson whenever a teacher suggested it. And even now, I don't wanna be home during semester breaks, I'll be resuming my 4th year next month and my course is 5 years, the thought of graduating is beautiful but also saddening. I'll no longer have my space and I'll have to go back home. I'm just a last born, a soft girl apparently, so I can't even make the decision of not going back home after graduation. Is there anything I can do? To relieve my chest? Is there anything I can do to relieve myself from this nightmare of a person? I didn't have anyone to tend to me as much as I craved growing up, several times I wished someone asked me if I was okay and tried to get me out of that place but no one did and no one will. Everything my sis has ever done for me only burdens my soul. I'm never truly excited by the thing she has done for me, I just put on that face to make her feel appreciated. I rather feel frustrated and guilty to have her take care of my needs. What could I have done?. Nobody knows how uncomfortable it is being around her, how terrifying is her voice and how sharp her words is. I'm overwhelmed by the thought of her yet again, cos we started to seem close, and that is because we recently had an issue which kept us out of contact with each other, tho those periods were very peaceful for me but my family won't watch that go on. Out of sight, out of mind right? I'm terribly stucked in a life that I don't wanna live. The only place I am myself and free is my self-contained room(hostel). I considered myself very brave cos I still go home during semester breaks, tho I always rush back to school, lying that we resumed already. Even tho the most I've spent during those breaks is just 3 weeks, it usually feels like forever. I have to be mentally, thoroughly and physically prepared when going home cos I know it's never going to be nice. To spoil it all, this person is still the same, she's one who doesn't care about what she says to me. She speaks whatever she wants and say it however she wants. She is the older one(34y.o) ofc my feelings won't matter, once I'm physically well. I'm from that kind of family. I wanted to disappear many times but I'm not capable of doing that, I can't even financially be responsible for myself. It doesn't matter how many times she hurt me whether in the past, in the present or future, I dare not say a word or feel a thing cos I shouldn't have existed.