Why is this girl staring at me?

Every time this girl is off her seat she stares at me and theirs nothing behind me. She ain't spacing off either. One time she was packing up and while she was she kept repeatedly starring back at me and I caught her and she kept on staring. I sometimes just see her randomly looking at me and i just see it through my peripheral vision so she doesn't know sometimes that i can see her.

Another time she was standing out of her seat once again, but i looked at my aquitance whose next to me cuz my aquitance spoke to me and i saw the girl staring right at me but she quickly turns around completely and goes to her seat. also my aquitance is a girl by the way if you wanna know. Here is seatings. also im too nervous to ask so i just wanna know what you guys think

Why is this girl staring at me?
Why is this girl staring at me?
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