There is a word in astronomy called "Roche limit". It is said that the planet and the satellite are pulling each other, but there will be a limit distance. If they move closer to this distance, one of them will be deformed into an elongated ellipse due to tidal action, and eventually collapse and be destroyed.
Perhaps the most lasting relationship is about being infinitely close and always keeping distance.
Intention: I hope you can remember me, remember that I lived like this, and stayed by your side like this.