[ Singles & Dating ] Open Question : A girl I like doesn't know how to act around me?

I've liked this girl for a long time, and this whole time she's kinda speechless around me, doesn't really talk to me, and at times even ignores me. My friend (who is a friend of hers) says that she doesn't know how to act me around me because she's never really had a guy like her like me. (and i like her A LOT) Shes not really into guys (has guy friends though) and has been asked out once before (By my friend who told me the information, ironically). But she's smart, nice, not shallow, and is a really good person. What does this mean?