Lovers are never tired of each other, though they always speak of themselves.

Ordinarily, talk about oneself is what makes company tiring. Between two people in love it does the opposite, because each is genuinely interested in the other’s interior, and the self described is one the listener wants to know about. What makes conversation dull is not the subject but the absence of interest in it. The fault in a boring exchange is rarely all on one side.

In the relationships you want to keep, make it a habit to ask about the inside of things rather than the schedule. And watch whether anyone is still curious about yours, since that tells you more about a friendship than how often you meet.