Most Helpful Girl
she's either socially awkward <i know because i Am. which usually means you over-think things and end up pulling a blank instead. or say stupid shit etc
or the other one which is not interested enough to say much. give things time she might come out of her shell. everyone's been through something
Most Helpful Guy
there's a big difference between being shy (hesitant with strangers), and a dead fish (hesitant with everybody). If she isn't demonstrating an interest in you by asking you questions and trying to spark conversation, then she isn't interested in you, it's as simple as that.