I have to say that I was rather impressed by the structure you used! :)
Before I stand in awe, there is one note I would like to make: I expected in the last stanza for the first line to read "that dreamy man bent down on one dreamy knee." So what happened? You may want to fix this, unless you feel that it is unnecessary.
Anyways, I absolutely enjoyed seeing Lily's growth in this poem, and the stages of her crush getting worse and worse. Of all the lines, my favorite had to be "and proudly struts to the winner's ring" because it was the line that gave me a mental image of arrogant James Potter strutting about.
I also really enjoyed the emphasis placed on each stanza of the "chosen" words: silly, stupid, crazy, dreamy. These are all words I usually associate with crushes, because it is so true- they are silly and stupid and crazy, but the guy is so... dreamy!!!!!! You captured this so well! Fantastic job.
The rhyme scheme was brilliant for the subject of the poem, because it was slightly goofy, suggesting that James is ridiculous and that Lily is being driven mad by it, but it is a light tone, rather than dark. I'm rambling now... :)
Searching for my silly crush, stupid dream, crazy love, dreamy groom...
Cool. I think you got the rhythm in this poem written really well. I love the transitioning of each stanza, you can really see Lily's transformation.
Good job! :D :D :D
Love, this is so cute and perfect!