confused

Dear Lord, Please help me search and find who I am, for the past two years I have been living with my dad because me and my mom haven't been getting along at all. My dad has this new girlfriend who makes my dad even forget I exist. She tells him things that make him think I'm a bad kid. she treats me so awful sometimes I just give up and don't know what else to do. she tells him lies. I haven't been too church in a long time because of her. She is making me lose myself. She took volleyball away from me. She took school activities away from me. I don't know what to do. Please help.