Is this a normal behavior from a girl? I know I am a girl but I am just wondering this from a girl who I know?

There is this girl, who sits right behind me in class in English and whenever I come into class, she stares at me until I sit in my seat and she does this many times a week and when she doesn’t do this she does this in another class that we have, I don't know why she does this, do you think she has a crush on me or just finds me hella attractive? Or she is lesbian and also her friends know about me. And also she checked me out as well one time.
Is this a normal behavior from a girl? I know I am a girl but I am just wondering this from a girl who I know?
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