Do girls repeatedly look at guys that creep them out?

There's a girl at my school that seems uncomfortable around me and crosses her arms when she sees me. She keeps on staring at me with a completely blank expression whenever we pass each other in the halls. When I walk behind her she looks over her shoulder at me repeatedly. I also notice that she takes a lot of quick glances at me from far away.

I noticed that we have a lot of the same hallway routes so maybe she thinks I'm following her and she's creeped out? I feel kind of weird about it and I'm considering switching my hall routes to avoid her.
And just to clarify - I'm pretty sure she has a boyfriend so I don't think the looking is because she likes me.

Do girls repeatedly look at guys that creep them out?
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