What does it mean if a girl looks at you everytime you enter the room?

What's up guys?

So just to clarify, my crush's assigned seat is in front of mine. We didn't text each other during the holiday and we didn't see each other at all. Today, when I entered the class room (before the class started), she was on her smart phone. She kept looking at me then after some seconds, she smiled with her teeth (then I said "Hi!").

So basically, it means that I got her attention. I mean, she stopped looking at her phone to look at me...

Some weeks ago, during the class, the teacher allowed me to go the bathroom. When I cameback in the classroom, she looked at me (even though she was supposed to be working on her written production). When I came closer, I think she looked away and smiled with her teeth (as far as I remember, but maybe I'm wrong). And at least a week ago (while we were continuing our writting production), I asked a question to my teacher. When I was walking back to my seat, I saw her looking at me. But she didn't smile or say anything. She looked at me continually.

But later (when me, my crush, a mutual friend and another girl were talking together), she mentionned that she has a boyfriend. She was not saying it directly to me, but in November, when we had our first true conversation, she mentionned something about her boyfriend. But y'know, today was the second time I heard her saying anything about him.

I'm very confused. I really don't know what to think anymore. But I will still ask her to prom (later this year).

What do you think about this?

What does it mean if a girl looks at you everytime you enter the room?
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