Why did this girl glance over at me 3 times?

Anonymous
Yesterday in class we were standing in groups and while the teacher was talking i was laughing with my friend and i noticed this girl looked over at me so i was like ok and then i glanced over again and she was looking at me again and looked away quick when i looked at her. And then when we were ready to go back to our seats she stared at me one more time all in like 10 minutes. What could this mean i don't really talk to her.
Why did this girl glance over at me 3 times?
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