There are classmates at school watching you behind your back. Look at your jokes and call you your nickname. When new students transfer, tell them my nickname and so on. I am a boy.

Then kick it! If someone is really sincere, you can't control his thoughts, his actions and his mouth. What you can do is to control your mentality. As long as you don't think so, as long as you don't care, then others can't get what they want from your reaction, and over time they will get bored and give up. So, you should abandon that idea now, and don't always feel that everyone is targeting you.