A colleague often laughs at me. I don't even want to talk to him now. What should I do?

What others think or say about you is not important. The most important thing is that you should adjust your state, work hard, and don't get upset because of the little opinions of others! As long as you work hard, you will get good results, so that no one will laugh at you!

And sometimes you may think too much, others may not care so much and make fun, but you care too much about that feeling. In fact, everyone's ridicule is also your motivation, isn't it?