Maybe you should have taken some of your own advice and let her know you like her ?

Here's the skinny from somebody who has "been there, done that", OP. Stop wasting your time trying to make girls make the move on you because if it works, it works great - However, if you get a really shy girl you'll develop far too much of a connection to her with your time invested than she has developed with you. This is ok if the feeling is mutual but if it's not you'll be completely crushed by somebody that shouldn't mean much to you in the first place.

Instead, PUT YOURSELF out there and make the move quickly. . .If she turns you down no harm done to you, AND, the added bonus of you not caring so much because you have no time invested. Now, I'm not saying go out there and ask every girl out on the street out just because the word know isn't as devastating as you think but I am saying you can't go out there putting all your time and effort into girls based off silly assumptions.