What does the girl mean by saying thank you?

Thank you is a polite language. Just thank you very much for what you did before.

The first is to analyze according to different situations.

1 The situation is that when you are pursuing the other person, the other person refuses you, but at this time, you are not pestering the other person, you are not entangled with him, and you are not slandering the other person, so at this time, the girl is particularly grateful to you, because you are a person who knows how to respect and understand women, so he will continue to be friends with you.

The second possibility is that this woman is in trouble now. She didn't ask you for help when she was in trouble, but you took the initiative to help him solve the problem, so he would say thank you to a polite person. At this time, you should also tell the other party that you can come to you whenever you are in trouble, because you and he are best friends.