Girl's Behavior

What does it mean when a girl jokes around with you?

I have a few friends who are girls and one of them lately had told me that " why don't you like me i am a good girl to not just the girl that you like is a relationship type girl " and when she was saying that she was smiling then she said i am just playing. She had told me that like twice. Another one did the same thing but i am sure the second one was just playing.
What does it mean when a girl jokes around with you?
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