What does it mean when a girl laughs and says...

There's a girl in my church band that I like and I think she may like me too, but I'm not sure. One night, while we were practicing, I held up some "egg shakers" (which are musical instruments) and pretended they were boobs. She laughed and said, "You're a mess!" Does that mean she thought I was funny, or did she think I was crazy or a pain or something? What does it mean when a girl laughs and says something like that?
What does it mean when a girl laughs and says...
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