She doesn’t do anything for me but I have to?

So my stupid little bitch of a sister it’s the worst thing that has happened in my life. I wanted to spend my weekend with my boyfriend but I have to stay and take of my brother just because the little brat wants to go to spend Sunday with my mom away from my brother. She doesn’t do anything for me, she can see me struggling with shores and she would stay in her cellphone talking shit with her friends. and if asked for help she’d say: I won’t do anything and will never do shores. What the hell does she think she is? But I still have to do things for her, my mom asks me something and its like she doesn’t even asks me, she wants me to do it. As if I were forced to do favors to the little fucking brat. I wish I could send them both to the hell sometimes. Especially to the annoying brat. I hate her and I wish she was dead. Well you don’t know my life, and there’s not space in this world for she and me. One of us wasn’t meant to be born. Of course it might be me. But I wish it was her. I hate her with every force you can hate someone.