The speaker is mourning someone who has left. Before going, that person told them to fly away and find their own stars, as though the speaker could simply go off and discover who they are alone. But the speaker feels differently: their whole self was never out in the sky somewhere. It was resting in the other person's eyes. Being seen by them was where they felt complete.
The hourglass is the central image. Sand pours down until the top is empty, and the speaker cries while it seems to mock them. The poem suggests they feel stuck in the gap "between the time and the distance" the other person left behind, watching moments drain away with nothing to hold onto. The final line, "I ran out of time," is blunt and quiet, and it lands like a door closing. The mood is sad and hollow, with a sense of helplessness. The short, spare lines make the loss feel plain and unadorned, like a confession.