If a shy girl laughs/giggles at you with her friends?

not sure what's going on but I think this girls shy.

She would play with her hair sorta like throw it around and I immediately look ( since I sit behind her)

I didn't realize this before, but consequently, she has a smile on her face // her friends sorta giggle.

But when I approach her, she doesn't say much and when I try to make eye contact she looks down or away. ummmm ok?

why is/her friends laughing me?
If a shy girl laughs/giggles at you with her friends?
Post Opinion