What happens when a girl says she likes you and later tells you that she is joking?

Hello: If you like her, just say "I'm serious, you are responsible for me" or something.

If you don't like her, consider her a complete joke.

Another possibility is that she is not joking, she is waiting for your response or she is afraid that you will laugh at her too actively, so she is joking.

All right, take it. Thank you.