The dynamics are real
Two people in a bond couple, in the literal sense. Their physiology entrains — heart rate, breathing, sleep, even step when they walk together. The bond reads as coherence: a two-oscillator system locked near one phase, and falling out of love reads as the order parameter dropping, phases sliding apart, drift. There are even equations — Strogatz wrote a couple's feelings as coupled differential equations (the "Romeo and Juliet" model), and you can solve them. The dynamics of love are ordinary applied mathematics.
Grammatically, not numerically
But you don't read love off a number. You read it off the form. The clearest signal is grammatical: couples who say we instead of I and you are the coupled ones — Pennebaker's work on function words, where the bond shows up in the small connective words, not the content. Love is a pronoun merger. It is second-person — a turning-toward, an address to a you. It runs in the present continuous — being-with — where grief drops to past tense and longing slides to the conditional. And it tends to plain declaratives; trouble knots into hedges and subjunctives. Love's distance from the ground is legible in its grammar.
The seam that matters
Here is the line the whole note turns on. Grammar and dynamics are the readout, not the love. They can be performed — "we" said with no bond behind it, sync with no warmth. So they are a real signal, never a proof. The felt being-with is not computed; it has to occur — the same wall meaning and experience hit everywhere else (see Kinds of Un-shortcuttability: semantic and phenomenal givenness can't be derived, only lived). And there is a sharper edge: calculating love instead of living it is the one move that reliably kills it. The model is safe; substituting the model for the contact is not.
The math is the shape of the wave. The love is standing in it.
So: yes, calculate love — the coupling, the coherence, the drift, the grammar. All of it is real and worth knowing. Just don't mistake the readout for the thing. You can map the wave to the last decimal; it still has to be stood in.
Phronesis