Rumour heart

You've heard the rumour?
It's true
I do sleep with one eye on my heart
Why do i do this?
I have let my heart get stolen
One too many times
And we all know thief's aren't the most careful people 
and wouldn't you know, It's been broken
More than once 
How do i keep an eye on it?
Let's just say
It's easy to watch something that has been
Torn out and stepped on
You are probably wondering
How my heart has survived all these years?
That's easy
You can't kill something
That was never alive