Nice poem that blends seasons and a growing love.
Each season is shown with a unique feature that corresponds with the lovers' feelings for one another.
"autumn brought parting
yellow daffodils turned brown"
Winter is shown to be a season of sadness. But I have heard of a "winter of world of love" too.

Imagery-
Imagery revolves more around nature, which is used as a kind of mouthpiece for love. Flowers are visible and the lovers for whom they are used as symbols are perceived by the reader.

Form-
Each stanza sums up the season and the stage of love. Brief and expressive. It is a Free style poem that lets the thoughts a free vein.

End-
This poem ends on an optimistic note. Not all is lose. Memories remain and there lies the germ for rejuvenation.

It flows well.

Write on!