Coming from a girl, it sounds like one of two things, either:
A: She is interested in you but she is shy, or fears awkward communication.
B: She is not interested in you and that is why she shys away from conversation with you.
There’s no way to tell unless you wait a little longer and get to know her, because if she is interested, eventually the communication will get easier and she will hopefully come out of her shell more. Hope this helps!