Is she interested or just curious?

I work with a girl who I find attractive. I'm not really pursuing because I feel like she's not interested. I have noticed that when I'm talking to her, her eye contact is fairly normal and we have regular conversations but when I'm looking at something I've noticed in my peripheral that she stares me and I've had people tell me she stares. Is she interested and maybe a little nervous or just curious? I ask because I'm a little confused and also don't want to waste my time if there's not really any potential.

Interested
Curious
Entertaining to watch
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Is she interested or just curious?
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