I Don't Understand

I want to give you,
All that is in my heart.
You've given me life,
Awakened deep within my chest.
Showing me a love,
That will never leave.
Once again I crumble before you,
Collapsing to my knees,
As I cry.
And once again,
I ask for forgiveness.
The guilt is devouring me,
Eating me from inside.
I have failed you.
I have failed you so many times.
Each hurt,
As painful as the last.
I try to make you happy,
But always,
It falls through.
The mistakes I make,
Cause your heart to wither,
Yet as scarred as it is,
It still beats.
There is a love,
Running through your body,
That can never be ruined.
Maybe this is why,
You allow me to stand here.
I don't understand,
How you can still look at me,
And not feel the pain.
How you can still show you care.
Sorry no longer exists,
For it died long ago.
All I ask,
Is that you keep my heart.
Keep it safe inside yours.
I told you,
I don't want it back.