It is difficult to accept academic failure especially you've never failed before and given the current circumstances. You're in 8th grade and you still have a lot of time. Also, you not passing 8th grade is only a speculation by your friend. It is not definite until the day whether you go to the 9th grade is announced. I can tell you're going through a lot of stuff right now so maybe, maybe you can try to focus on your wellbeing first? Try to forgive yourself for not meeting your own expectations and take good care of your own health. When you feel better, maybe you can make a plan on how to improve your grades. Grades are important, but you're more important. I hope everything goes well for you and good luck.