Wow, this girl must really be beautiful.

A few things, but these are mostly opinions of mine.
1) Did you mean to capitalise the B in ’She’s Beautiful in the rain’ the penultimate time?
2) The line ‘Making her eyes her most attractive quality’ seems really out of place. It seems more analytic descriptive rather than the emotional description that encompasses the piece.
3) Also the constant ‘creating the effect’ could be made more feeling. Less of a simile and more of a metaphor.

Other than that it’s beautiful. I love the picture you give of this woman. You can really feel the love protagonist sees in her in certain lines, especially the first stanza.

Some lovely imagery and a good use of repetition.