The Game
You met her (this could apply to both sexes, but to avoid the confusion of "he/she," let's make it a girl) via a mutual friend, and just had a casual date at Vine for dinner. It’s the day after---now what do you do?
Assuming you really liked her, the question for a lot of people is this: “Does she feel the same about me?”
You’ve been texting and reassessing your “success probabilities.”
Do smilies mean that she’s interested?
Should I call, or should I wait?
You've been putting it off for hours now, but you still can't decide.
Stop worrying for a second.
Put down the phone for a second and look at it logically---using game theory.