-you catch her looking at you, peeking, staring,
-she contacts you to talk randomly (phone email Facebook)
-when she looks at you, and you catch her, she looks down or away covering it up
-she smiles to herself
-she seems sad when you leave or don't say hi
-you know she's the quiet and shy type...so its like death for her to ask you out...
Most Helpful Guy
No, no, no, no, no, and no. Guys are direct, and tend to ignore anything that's subtle (unless they're TRYING to see the subtle clues to impress a woman, and even then they usually miss most of them)
I've had girls do this with me and I was completely oblivious to it, thought absolutely nothing of it... a few of them have come forth and told me that's what they were doing, and that's the only reason I know.