What are the sentences similar to familiar strangers?

1. We became the most familiar strangers in the world.

2, the most familiar stranger, I don't know what kind of identity. What kind of tone to greet. So I chose deadpan and silence.

We can't be friends after breaking up, because we have hurt each other, can't be enemies, and love each other deeply, so we become the most familiar strangers.

You used to be so familiar, but now you are the most familiar stranger in my life. A beautiful flower affair is finally fixed as a pale wave in the lonely world of mortals, and those roses that have vowed to each other are gradually scattered and empty in a thin and indifferent time.

You said that we are the most familiar strangers now. This sentence divides the distance between these years. Familiar only with distance, or unfamiliar? Love is at the end of the world, people are close at hand, facing each other from afar, and reading is always both love and sour. I don't understand whether it is familiar or unfamiliar.