dude..understand how "tong ku" u r feeling now..
You like someone, yet either no chance, or no courage to approach
her..
Well, like some said..its purely crush at this moment because you
do not even know her personally yet... U r judging her on your
first impression, which sad to say, normally doesnt represent the
actual her.
It is easy to tell u to approach her directly or talk to her, get
her number, blah blah....BUT we all know how difficult it
is...
Sometimes, it really takes abit of time, environment and
opportunity. Frankly speaking, you can either try and create more
opportunties to "bump" into her and ask her about her class, or u
can keep your finger cross and hope she will come n talk to
you(unlikely).. Tian he di li ren he...
Since you know she is intermediate level, you can take up more
lessons to speed up and at the same time, more days to see if you
can bump into her.