Do girls talk about everything with their girlfriends?

I sit at the end of class and this girl sits in front row.
First, my crush stared at me without me looking at her so I knew the moment when she started liking me.
Then she gave me signs in class by giving eye contact , i approached her after the class asking for notes , she said take it tomorrow.

Tomorrow, she walked away but still maintained eye contact but I dint chase her.

Next day, her friend was amazingly excited, when I entered the class she said something to her friend and she smiled embarrasingly.

After the class ended, her friend stood up from her seat , turned back and stared at me for 2-3 seconds with a big grin on her face.
I'm confused, does my crush like me or she and her friend making fun of me?

Was the day when she was supposed to give me notes, did her friend told her to ignore me and play hard to get?
Its so confusing.
Do girls talk about everything with their girlfriends?
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