Men send text messages saying they have nothing to do.

This man's WeChat reply may have many meanings, depending on the context and background. Here are some possible explanations:

1. He may want to end the current chat because he thinks you are busy or he has his own things to deal with. In this case, he means to let you go about your business and say good night to each other.

He may be a little angry or dissatisfied, because he thinks you don't pay enough attention to him, or you don't respond to his needs. In this case, he means that he doesn't want to continue chatting because he feels interrupted or ignored.

He may just end the chat politely and wish you a happy evening. In this case, he meant to show concern and friendly attitude, but he didn't want to continue talking.

In short, to understand this man's meaning, you need more contextual information, such as your previous chat records, his tone and attitude.