I'm so sorry you are experiencing this. I struggled a lot in high school with similar issues but I can tell you that it will get better. Try to hang in there. Do you have any friends there you can rely on? Avoid the people who are mean to you?

After high school things can change - you have more freedom. You are more likely to be able to meet people who have similar interests and values to you and be able to avoid those who will bring you down.

Hang in there