The speaker describes falling in love with life again and again, and each day the reason is different. Instead of pointing to one big event, the poem piles up small, ordinary moments: the first snow, leaves turning color, a field of dandelions, two butterflies, a dog rolling in fresh grass, a cat curling up nearby, the moon on a warm night, waves hitting the shore. The repeated "maybe it's" suggests the speaker isn't sure what sparks the feeling, and doesn't need to be. Noticing is enough.
The mood is gentle, grateful, and quietly hopeful. The last line changes the tone a little. When the speaker says this is "the best feeling, after being numb for so long," we realize the earlier joy matters so much because it follows a hard stretch. The poem doesn't explain what caused that numbness, but it suggests that feeling anything again, even delight in a cat or a dandelion field, is something to celebrate.