The speaker is already dead, looking back on a life spent alone in the snow. Nobody noticed them, and nobody tried to. The images are small and bleak: a swing hanging from old rope on a lone tree in the middle of nowhere, and children playing and singing in the distance while the speaker watches. Their efforts to change things came to nothing, and the jealousy and tears they describe feel raw even though they call their heart "dead."
The mood is cold, quiet and sad. The speaker says they were so "frail and transparent" that they vanished "without event," which makes their death feel as unnoticed as their life. The ending shifts slightly. "What if my life was different?" brings a flicker of longing, and the closing question, "It would be nice, wouldn't it?", sounds wistful and almost hopeless, as if the speaker is asking the reader to agree.