Im getting blamed

My dad and my mom are divorced. So my dad got a girlfriend. She has6 kids and I became really good friends with 1 of them. Her name was codie. One day she introduced me to her best friend brian so me and brian became really close friends because we liked eachother. And so codie got jelouse so she told brian not to talk to anymore becuase I would try to get him into trouble which I wouldnt because I liked him!!! So brian knew that I wouldnt try to get him into trouble so we kept talkin to eachother anyway. Then codie found out and started to threaten us. So me and brian didnt talk 2 eachother 4 like 4 months and I was really sad. So my dad finnally found out why I was so sad and he got really mad at codie and broke up with her mom because me and my dad protect eachother so when im in pain hes in pain to. After he broke up with her mom codie and her mom got really mad and then codie started to make fun of my dad and its really really hard to make my dad cry but codie went to far and made him burst out in tears!!! It made me cry and brian cry because he hated to see me and my dad go threw this. Sooo now codie and codie’s mom are blaming me 4 makin my dad break up with her mom. What should I do??