I’m so sorry to hear how you are feeling about this. As some people have already said, high school itself can be rough and teenagers can be shitty. So hang in there and endure a little bit more until college. It would get better, or at least that has been my experience. I got my PhD defense a week ago. Stutter like never before during my 40 minute presentation. Felt awful after and could not even celebrate. I was tired and just not in the mood. Today I decided that that day cannot define all the years of hard work and the fun I had doing my research. Finish high school and go do the things you love. It will get better OP.