This girl is very confusing?

-She would look at me then quickly look down, turn away. I see her staring at me in halls

-Sometimes her eyes got dilated when looking at me

-She would talk louder and sometimes acted awkward/nervous around me

-She always stares at me in class

-When I used to talk to her she would always remain silent smiling and talking in a soft voice, never looking at me in the eye.

-I noticed her straighten her hair sometimes when around me, she would fidget

-A couple of times when she walked by me she smiled right to my eyes, then looked down and walked faster

-She acted different with other guys, more normal.

Anyways I found out that her friends really dislike me. Sometimes they make fun of me/laugh at me.She rejected me saying that she doesn't like me. She stopped with all the above signals but I still notice her staring at me sometimes in class and outside,sometimes for long periods of time. Her signals are minimal now but I would catch her looking at me and quickly glancing away or looking at me through the corner of her eyes. I'm confused over what I was receiving because by how she's acting and what she said, this girl really didn't like me.