Someone has been left behind, and the speaker can't make sense of it. They describe a person who is close to them one moment and gone the next, with no warning. The speaker is left aching and begging for him to come back, but admits those pleas feel like screams into an empty space. He doesn't seem to hear them, and he isn't affected.
The feeling here is hurt, mixed with helplessness. The last lines carry the sharpest pain: the speaker wishes he could understand how much they care, but the sentence breaks off before it finishes, as if even the wish can't be completed.
The layout adds to this. Lines drift across the page, with some pushed far to the right and a few stuck at the left edge. Words like "like," "he," "doesn't," and "care" sit apart from the rest, which makes the poem feel jagged and uneven. The mood is quiet, sad, and a little desperate, like someone talking to a person who has already walked away.