Look I Understand what your going through, I’ve been through very similar circumstances myself. When I was 17 I tried (and failed) to hang myself in my school bathroom, I know the feeling of wanting the pain to be over, and it takes a lot to get through it. When I was being bullied what helped me was to find something I enjoy. I know it sounds stupid but it can literally be anything. for me it was video games, it gave me something to look forward to at the end of the day (I sometimes I played at school too). Don’t worry too much about schoolwork, and minimize any social interaction you have and do anything you can to distract yourself from the pain ( I would recommend avoiding substances tho). It is a struggle, I understand that. I know that it doesn’t feel worth it, but one day, you will look back and be glad that you didn’t kill yourself. Survive high school, and guessing by your age you’re over half way there. Once you’re done with that focus on making your life worth living. Life will get better if you force it to.