"Hints" vs. "just being friendly"; girls, how can we tell the difference?

Using yourself or other females you have seen / known:

How do you (or other girls) act differently when "dropping hints" to a guy that you (she) is attracted to...

...versus you "just being a friendly person" to a guy that you (she) is NOT attracted to?

This is one of the most difficult things for us males to do when attempting to decipher female behavior.

When the girl is naturally very shy and passive, this "line" between the two behaviors is even MORE blurred. :-X

Please help us males understand the difference! :)
"Hints" vs. "just being friendly"; girls, how can we tell the difference?
Post Opinion