My cousin told me that a girl from Houcun is going to see her the day after tomorrow, so I won't tell her. I'm really worried that something will go wrong then. What should I do?

Don't be too nervous. Maybe that girl is as nervous as you are. Meeting for the first time, no one knows anyone, so I'm nervous. I think you just need to be polite, pay attention to your manners and dress neatly. This is the minimum respect for each other. You can start with your hobbies, and maybe you can find your favorite topic from them. If the other person doesn't want to answer the question, don't force it. This is also a respect for each other.