There is a girl, and I can't find anything to say to her. She always listens to me and doesn't talk. Why?

Maybe she doesn't know you well, so she is more restrained. Maybe you should take your time, gain her trust, treat her sincerely, and see if her reaction is because she doesn't know you well or for other reasons. If it is because of restraint, treat her sincerely and easily. She will feel it. If it is for other reasons, then the problem must be solved. Solve her doubts and misunderstandings and she won't misunderstand you. The most important thing: treat it with heart. You won't regret it.