Let's say a girl gives you a big smile, you smile back, but you don't make a move. Days go by, you see same girl again, and this time she doesn't smile at you...and you see her again after that and no smile.
So a few questions on this:
1) Does that pretty much mean all interest is gone on her part?
2) If yes to #1, why does interest vanish so fast?
3) Is it possible to bring interest back, and if so, how?