I think my sister is a narcissist

For some strange reason extremely strange, my family doesn't want to celebrate my wins or help me achieve my dreams. For my sister she always doesn't show interest in what I do. I was 130kgs in 2021. In 2022 I was exercising consistently she said *oh you'll never lose the weight* plus when I came home one time I was 16 I told her I met a girl I like. She started flipping out she took 20 of my antipsychotics tablets and shoved it down my throat. And repeatedly shouted die. As a result I gained 70 kgs overnight I was 51 kgs when I came home. When she came home from University in 2021 when all of this happened she said*it's to look after him*.

I knew that moment she wants to control me . My best friend said she wants to control me. She always uses her anxiety issues and acts narcissistic.

She can't even buy me anything with her money but she demands or throws it in my face that she bought me something. She can't even spare 100 rand for me. That's 5 dollars. But she will blame me And be abusive in secret when we're alone. I don't even have a phone. I got robbed and stabbed all she said was you shouldn't have been walking home. No crying no nothing. When I told my mom she laughed. It's only my father that was angry. I'm using my mom's phone now.

What should I do to get out of this awful situation?