What does it mean when a girl stares at you then laughs?

There's this girl that sits one next to me in school and we don't talk to each other much. everyday she would turn towards me and stare at me and I would do the same. Then she would just laugh and turn back. I think she's cute but I'm don't know what she thinks about me. does she like me or what?
What does it mean when a girl stares at you then laughs?
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