I think she was just being nice? From what I see, there's no
indication of attraction.
However, the point about her going down to Chinatown to buy herbs
for you is a bit puzzling. Does she do that for her female friends
as well? Or is she by nature, a helpful person?
Let me tell you that some girls just wanna have
guys as their good friends, not boyfriends. But
guys always get the wrong idea, and blame them for giving the wrong
impression. Actually, it's the guys' fault, because they're so
'into' BGR that they cannot accept friendship from the opposite
gender.
If you want a more precise answer, ask a close female friend of
yours to analyse your situation. She will definitely be able to
tell you much more than I can. Why? Simply because I'm not a female
