Prison? Or Paradise?

My heart is trapped inside a cage
It's far too dark in there
I hear it knocking on my walls
But I can't open anywhere

My heart is trapped inside a cage
It's getting lonely now
I'm sorry, I would let you out
If only I knew how

My heart is trapped inside a cage
Beneath the bone and blood
It waits for an escape
For the savior we call love

My heart is trapped inside a cage
Bouncing now against the walls
All it takes is that sweet face
To put its ache on pause

My heart is cracking this old cage
In hopes to get to you
It wants to leave this hollow shell
In hopes yours might take two

My heart is leaving this old cage
And now you have it safe
Locked away inside your chest
Now two hearts embrace

My heart's absence leaves me still
I think I am to die
For if I have given away my heart
What exactly am I?

You place your heart into my chest
And now I understand
We have to keep each other's safe
Inside our boney bands

Your heart is safe inside my cage
My ribs have grown anew
Is that why God gave me this rib cage?
So it could protect you?