The older you get, the more complicated your thoughts are and the more questions you consider, and you will find it very tiring to make friends. Because the more people you contact, the greater the probability of being hurt. For self-protection, you don't want to make friends. But it doesn't matter, everyone has this stage. When we change from simple to complex, escaping is a normal reaction. Because I have experienced complexity, I feel that simplicity is more valuable.