GIRLS this girl in my class tells me she can't figure me out. what does it mean?

there's this outgoing girl in my class in college. we talk frequently and we're on good terms. but she really confuses me when she says : i'm usually good at reading people but i can't figure you out.
if you want more detail :
-her feet are pointed towards me when we talk
-she teases me sometimes
-sometimes she initites conversation
-sometimes she glances at me in class and the other day she just STARED at me when we were entering class , like a real deep long eye contact.
i appreciate your help :)
GIRLS this girl in my class tells me she can't figure me out. what does it mean?
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