Samantha Harper's poem is a raw burst of jealousy and grief aimed at someone who seems to have moved on. The speaker keeps asking "how is it fair?" while feeling stuck, waiting to be happy again, still suffering "without you." The person addressed appears to be tied to the speaker's childhood and to a former life that has been "sealed away," though the poem doesn't say exactly who they are or what happened.
The tone shifts as it goes. Early lines drip with sarcasm: "lucky you!" and "Good for you!" sound bitter rather than kind. Then the anger sharpens into "How dare you," aimed at a smile the speaker finds painful to see. By the end the bitterness drops away. The speaker admits to envying the other person's strength and resilience, and the final line, "I wish I was happy like you," is quiet and honest. The mood moves from resentment to longing, leaving a sense of vulnerability beneath the anger.