She keeps staring at me?

So, today I just entered a gymnasium (pretty much a high school). We were all new, and only a few knew each other. Already the first day, I started noticing this girl sometimes staring at me. When I returned her gazes, she either keeps the eye contact or simply looks away. She usually does this when I’m not looking during class. I also notice that when I am talking to my friends, she would listen in if she is close enough. I know this because she started smiling when I said something funny and silly. Does this mean anything?
She keeps staring at me?
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