Harbor's poem is a single sentence, and it turns on one word: "fell." The speaker starts with a familiar idea, falling in love, and says that in their experience it felt exactly like falling apart. Love here isn't gentle or safe. It sounds like losing balance, losing control, maybe losing a sense of who you are while you give yourself to someone else.
Then the last line changes direction. "Till I fell for me" repeats the same verb, but now the fall is a good one. The speaker stops coming apart and starts coming together, and the relief comes from turning that love inward.
The mood is quiet and hopeful, with a hint of hard-won wisdom. The poem is short and plain, which makes it feel honest, like someone saying something they've finally figured out. The title, "Falling," ties it together, and the speaker's falling ends up somewhere better than where it began.