Chelsea's poem is about a girl who has made apology into a habit. "Sorry" slips out of her mouth like a hello, and the poem suggests it has become part of how she sees herself: a "disaster," someone who is never quite enough for anyone. The speaker describes her with sympathy rather than judgment, and seems to ache for her.
The most telling lines are about what she never heard. Nobody told her she was good enough, so she filled the silence with her own harsh verdict. The "earthquake she created in her head" is a strong image, since the damage happens inside her, out of sight, and no one else may even feel the tremors. The last line, "too sorry for breathing around people," pushes the idea to its extreme: she apologizes for simply being there. The mood is quiet and sad, but also tender. The poem reads like an attempt to say the reassurance she never received.