Girl in my class keeps glancing at me?

So for the past like 2 months, this girl in my English class has taken every chance she's gotten to glance straight at me.

At first I was like *Wtf is there something on my face?!* After, that I began to catch her looking and she'd quickly look away. I was still skeptical because she's extremely attractive while I'm like...lol...

Anyways she keeps staring, but today I learned she recently got into a relationship. So now I'm the most confused guy in the universe.

Anyone have any ideas on what the hell is going on :(?
Girl in my class keeps glancing at me?
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