They love with every ounce of their being
Something that is never reciprocated 
The all encompassing pain 
that accompanies knowing that is reality
Syphons all joy from existence
What is fundamentally wrong with them
Is not fixable
A heart too big can’t get smaller
It can only break harder
They know that leaving will hurt you for a moment
But believe at their core
Your life is better without them in it
Another act of love 
To protect you
From them