The speaker looks back on childhood confusion and sets it against a painful understanding that has come with age. As a child, they noticed people whose eyes seemed dull even while their faces looked happy, saw a girl with scars on her arms, and learned the word "suicide." Each time they repeat the same line: "I couldn't understand why." The repetition makes the speaker sound young and bewildered, as if the world's hidden pain was something they could only glimpse from outside.
The final lines change everything. "Well now I know" suggests the speaker has come to feel this kind of pain personally, though the poem never says so outright. The flat, blunt ending, "I hate.every second of it," with its missing space, feels raw and unpolished, like something written quickly and honestly. The mood is heavy, quiet, and exposed. Rather than offering comfort or a solution, the poem simply admits how much has been lost between not knowing and knowing, and it leaves the reader sitting with that.