Love Poem Inspired by "The Robot and the Bluebird"

I fell in love with a tin woman 

she had a hole inside her chest
where her heart was meant to live
but nothing filled the space

she showed it to me one day
we were sitting in the grass, on a hill

she said she didn't remember where she lost it
to a man she once loved or in a bet, or to the salty, salty sea
who knows maybe one day it just fell out and she never noticed

I took my own heart in my hands
and told her to put it in her chest and keep it as her own

we stayed happily, with my heart beating in her chest for many years
one day she told me to open my hands and she gave me a bird, to replace what I gave her
she said me she loved me and wished she could stay with me forever, but now she had to go away 

I fell in love with a tin woman one day she had to leave
I gave her my heart because she had none to call her own 

and she gave me a bird
and whenever it sings or flys 
I feel my heart singing and flying too