The speaker of "Run." is caught in a feeling of motion that goes nowhere. "Running to stand still" suggests effort without progress, as if all that energy is spent just to stay in place. The poem then turns to someone else, asking them to look up and choose what they see: "the blue sky of what might be" or "the darkness of what never will." Hope and loss sit side by side, and the speaker seems unsure which one the other person sees.
The question "Do you see me?" is the emotional center. It sounds like a plea to be noticed, to be truly understood. But the last two lines undercut it. The other person begs the speaker not to run away, and the speaker answers that they already have. The distance is no longer physical; it is emotional, and it has already happened. The mood is quiet, sad, and a little hollow, like a goodbye that arrives too late to change anything.