The speaker describes love as a fall, and begins by poking fun at people who fall constantly, bouncing up and down in a dizzying cycle. She isn't like them, but she isn't someone who falls once and settles happily either. When she falls, she stays at the bottom for a long time, gathering strength before she can rise again. She wonders whether that makes her weak, lazy, or fickle, then decides those questions miss the point.
The point is the confession: "I've fallen for you." But it's hedged at once with "I think / Maybe / Perhaps / I'm sorry." The poem's mood is tender but anxious. Her uncertainty is quieted by a kiss that answers nothing, and her own question, "I love you?", hangs unanswered. Still, the ending is soft. She sleeps in his arms without nightmares, and perhaps even a dream, which suggests that doubt and comfort can exist side by side.