13 and back at it

So I'm 13 and when I was 11 I tried to commit suicide cause I have a pretty awful family situation, got bullied, my grandma died, all tht, I also made myself throw up and I cut my wrists. I stopped myself and I've been clean for two years. But this school year is awful again. Still have the family situation, I'm getting bullied again (even by a teacher, but my mom filed a complaint) I just lost my best friend (huge fight some really awful things were said) and I miss him so much, he's ignoring me and almost dating one of my other best friends. And I've been getting anxiety attacks very often. Because of all this I cut again. I feel disgusting and I hate tht I did, but I feel like I have to again. I don't know what to do...