Why do I feel that there is no one to talk to, as if I were the loneliest person in the world?

Go out and communicate with others in your heart. You take the initiative to chat with others, and others will take the initiative to chat with you! Over time, you won't always feel lonely. In fact, this is also a kind of interpersonal relationship. Do it well, your circle of friends will be wide, and you will know a lot of information. If you don't know something, others will tell you.