I'm a Terrible person 

   I'm a terrible person, 
I am a disappointment in my whole family. I always treat everyone badly to the point where I make everyone cry. I can never just chill and make normal jokes with my family or people my age. I always think my family feels dread when I come in the house. I wish I could change, I always say I will but I don't. I made my step-sister cry, I am only eleven years old. My step-dad told me that she doesn't cry too much. I have no real friends who I can actually talk to without them actually understanding or just saying "oh damn" and changing the subject. My family said they will kick me out the house if I keep it up. 
If I wasn't there, my family would have peace all over the house. 
  I always make my mom cry, I am the reason her life is harder. I wish I could change. Sometimes I wish she had another daughter other than me, she sacrificed so much for me, I am such an ungrateful bitch. I am very selfish, I always think of myself. my little sister looks up to me, I don't want to lead her the wrong direction. Will I change?