Her.

I don't think I have a word
that means just what I need....
See, I need a word to match a feeling.
It feels like she's the air I breathe.

It's so simple, so complex.
She's my chemical spark.
For the longest time I wanted her,
she's consumed my heart.

She worries she's not enough,
I swear that's not the case....
For her, I'd drop the world.
It's her I can't replace.