What should I do? People always laugh at me.

This is a typical expression of self-distrust. Do you always feel that you are not doing well when others are laughing, or that you are wrong, or that others are talking about you? Dude, if you are good, people won't laugh at you. If you are not good, ugly people are not interested and have time to pay attention to you and laugh at you. Just be yourself, don't care too much or pay attention to what you don't need.