Please please help me?

7 years ago my mom died a year later my dad married a witch that made us move because "it was to much like my moms house" then she took almost everything we had and left my mom wrote me a journal because she had cancer that was so if she died i would have something from her that witch stole it that was when i was 9 its been years we still do not have it she yelled at me alot she acused my dad of doing things he did not do they fought right in front of me she even blamed me for the divorce i remember screaming at her the day she left i hate you never talk to me again! she was always mean to me my friends are mean to me i knew they were gonna divorce because she was divorced 3 times already she cheated on my dad and then acused HIM of cheating on her witch he would never do she only adopted me because she was jealous of my mom my mom was a nice honest person my stepmom was not i can't deal with this what can i do?