What does it mean if a girl looks over her shoulder looking at me without smiling?

Anonymous
It all started last week when she would walk to the bin and as she walked back to hrmer group take a quick look at me, but if I caught her she would look away. Once she and her friends looked over their shoulders and looked at me. Then yesterday she looked over her shoulder by using both a side eye glance and turning her head to fully face my direction at times. Everytime I made eye contact with her she would look away.
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+1 y
I never see her talking or hanging around boys.
What does it mean if a girl looks over her shoulder looking at me without smiling?
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