The boy next to me talked to me, and the boy sitting behind me suddenly laughed. This is still a mocking smile. What happened? . .

You are a little sensitive, which shows that your mind is very delicate. Never mind, what you think is sarcasm may actually be kindness. Even sarcasm is because he doesn't know you. There is a saying: judging right or wrong is for yourself, and hearing is for others. There is another saying: he is forced by him, and the breeze blows the hills. There is no need to care too much about others, you just have to try to be better. There is also making more friends, walking alone, walking faster; But there is a group of people who can go further.