This is a great write. My only complaint is that in the last two stanzas, you used "goodbye" at the end of a line two times in quick succession, which kind of stuck out as a bit redundant. The buildup at the very end was excellent. I hope these love poems are being read by whoever they're written to :)
What can I say? Your write is deep with emotion, enough to fill the seas. The story told was just beautifully sad. Your flow was right on. I can not critque on anything that you write. Love is beautiful, yet brings us sadness... eh?