Sam M's "Breaking down" is about a girl who gives so much to other people that she has nothing left for herself. The opening line, "She's so tired of breaking down," sets the tone right away, and the shrugging question that follows, "But what can a girl do," makes her sound worn out and stuck, as if she doesn't see another option.
The poem shows her struggle through small, physical details: she eats too much and sleeps too little, both signs of stress. What hurts most is that nobody notices. The people she worries about are described with a bitter edge, with their "little fake smiles" and "little perfect lives," and the repeated word "little" makes them sound shallow, almost petty. The speaker seems resentful, though she keeps it quiet. The mood is heavy, lonely, and tired. By the end she is "alone / With the demons inside," which suggests her pain is private and that she faces it without any help.