“I love you” arms race

When two (or more) people get caught in a loop of saying “I love you” with increasing intensity or grandeur.
Ex-
Person 1: “I love you”
Person 2: “I love you more!”
Person 1: “I love you most!”
Person 2: “I love you mostest!”
Ad infinitum

“Those two are disgusting together, they constantly get stuck in an “I love you” arms race.”

love race

Where you live within in someone never ends.

My love for you races all the time. I call that love race.