If you laugh, you are not afraid of death, but you are also afraid of others laughing. Besides, at your age, you can't say that you don't know anything. You are really inexperienced.
It doesn't matter if others don't like you, because a person is not RMB, and it is impossible for everyone to like him. As long as you understand this, you will gradually become cheerful and more people will like you. Whether I like you or not has nothing to do with math.
A man will not be locked up, only he can lock himself up.
How to make yourself cheerful? I think we can start from independence, go shopping and do housework by ourselves, go less to big supermarkets, go more to small shops at the gate of the community, or go to the vegetable market with my mother.
Then you need to meet some friends, or you can be an introverted classmate, you will have more languages in common, and then you will meet more people. In this way, you can communicate your questions on Baidu with your friends, and introverted friends will not talk nonsense everywhere, which is safer.