Does scarcity make the heart grow fonder?

Or at least being less available?

I don't know, with this girl I have in mind, it feels like the less I do, the better. I know girls on here say that if I guy doesn't talk to them or isn't around, they think the guy's not interested and hence they lose interest but in actual practice it seems to be the opposite (unless the guy just falls off the face of the earth).
Does scarcity make the heart grow fonder?
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