It's not the best way to say it, just the easiest way, so I won't say it. I'll do that for you.
I'll say instead that you are the music that plays in the background of all famously filmed kisses, unnoticed by most, but required and significant.
I'll say instead that you are the movement of a child chasing a sparrow through a meadow, glorious goal never minding the lack of grace.
I'll say instead, my girl, that you are the words that all the poets had in mind when they set out, with quills for swords, to slay the denial of beauty.