The poem is built around a quiet, painful contrast. Each pair of lines starts with "because" and gives a gentle instruction: don't worry, feel love, don't be scared, don't cry. But the reason that follows undercuts it. Parents who should be home and loving are instead fighting, and the noise is violent enough that dressers hit the floor. The speaker seems to be a child, or perhaps an adult remembering childhood, signing off as "little girl."
What comes through is fear, helplessness, and a longing for an ordinary, safe childhood. The repeated "should" shows the gap between how things ought to be and how they are. The final lines are the most unsettling: she isn't worrying about the noise anymore, but about whether her father will come home at all. The mood is tense and sad, yet the plain, simple language makes it feel honest rather than dramatic, like a child trying to talk herself into being okay.