Help me

Honestly I am so loss. After I have lost my uncle this year, my first boyfriend who cheated on me and lied and gave out my private information. My parents are constantly bickering, and disagree on almost everything. My friends don't understand and seem to be tired of hearing my issues. One of my other close friends only wants to focus on herself and acts sketchy around me. I promise I am not self centered we talk about what they want all the time. Infact, I act peppy around them half the time they don't notice when I am broken. I am not always involoved in drama. Right now has just been extremely hard. My grades are fine but emotionally and socially its a struggle. I have moved on from my ex but every time he flirts with my friends and just all the girls. He got back together with one of my faded best friends. There is girl at school spreading continous rumors about me. I have so much faith in God, and right now I just need advice because I am lost. I am 13 years old by the way, and yes my ex is unfortunately in one of my classes.