I liked how you had a slant rhyme going, and then you completely ruined it in the second and third stanzas. It would be way better with the rhyme pattern. It was still a lovely poem. Keep writing.
My honest opinion is that this is better than the average teenage sap-rhyme. However, that certainly doesn't mean its a masterpiece. Your rhyme is all over the place and there is no actual meter, which makes rhyming impossible. If you don't know anything about meter, please look it up on wikipedia, because rhyming poetry needs it to thrive. Sweet sentiments, though, and I'm sure whoever inspired it should like it.
My writing is dark. I don't know why, it's just what comes out of me. I love writing and I love reviewing writing so give me all you can. If you want to get to know me, hit me up on facebook :) more..