The heart that couldnt go on

My breathing is different, there a hole in my chest
i don't feel anything, but a pain in my in my left breast

i flex to create a rush of pain, so that i can no longer feel the hole
but then i realize that is was my heart someone stole

i look for a clue to lead me to the person who has token my heart
i look around on the floor, walls, not sure where to start

but then,to my surprise, i see my heart on the window edge, and it jumps

horror comes to my mind, was my heart hurting so much, i start to get bumps

is there so much pain in me that my own heart will quit

why doesn't my life seem right, what part doesn't fit