This will not last.

Nothing you have ever felt has held a single shape from beginning to end. Even a long difficult stretch is not uniform — there are hours in it that are worse and hours that are oddly ordinary, and the ordinary ones tend to go uncounted.

That unevenness is the evidence. A thing that varies is a thing in motion, even when the motion is too slow to feel from inside.

Nobody can hand you a date. But permanence, in the entire history of your own feelings, has never once been demonstrated.