Over and over, the speaker asks "Who even cares?" The question is bitter rather than curious, and it points to small absences: candles left unlit, a dinner nobody shares, a little photograph with a pair of bright eyes watching from the corner. Judging by these details, someone is missing, whether through death, distance or a broken bond, and the speaker is left to cope alone.
The second stanza turns to words that were never answered, "Goodbyes" and "By your sides" that nobody heard. Days feel noisy with a "shattering sound," yet nobody seems worried about when it might stop. The last stanza widens the picture: ships drift apart, the sun races toward night, and a small heart is pushed to its limit and loses its strength.
The mood is lonely and worn down. The repeated question builds a feeling of being ignored, and the speaker's hurt seems to come from believing that no one notices how heavy it all is.