different people have different languages of interest. There are
those who get very nervous in front of the admired and shy away
from all contact. There are others who cant wait to talk to the
person all the time. Then of course, there are those who prefer to
admire from a distance.
One sure tell tale sign is that the girl looks you in the eye
and listen very intently when you talk. She may not be smiling or
what but she sure is listening very hard to every word you say.
This is a big turn on for them :)