Free to Leave, Free to Return
Most close relationships are built to be kept. Time together is the asset, absence is the liability, and the closer you get, the more leaving feels like something that needs explaining.
That arrangement works for a lot of things. But dependence comes with it, as a side effect. The relationship stays alive only while both people keep tending it, and one long silence can be enough to end it.
There is another way to build one. Imagine a relationship that asks nothing to stay alive. It is glad when you arrive. It doesn't mind when you go. It doesn't count the days or ask where you've been. And when you come back, it is simply there, without needing you to be who you were.
None of this is cold. The warmth is real, which is exactly why the freedom matters. If leaving costs nothing, then arriving is a choice. And a choice is a better thing to be welcomed for than an obligation.
I think this is rarer than it sounds, and worth designing on purpose. Maybe the quietest kind of closeness is the one that never needs you to stay.