What does it mean that girls don't return to WeChat?

The first situation is that she is willing to do the role. She just doesn't like WeChat chat, so she is very enthusiastic with you when she meets you. Then she might feel better about you. This situation is unnecessary.

But I think the second possibility is more likely. She doesn't really like you, so he doesn't reply to you much on WeChat, but when we meet and chat, you can feel her emotions, so he has to pretend to be particularly enthusiastic. In this case, people will not say that she is a particularly cold person.

Chat with her at a strange number and see how she responds.