Reverse This curse

I try to lock it away,
Isolated,
Chained,
And boxed away,
Behind large barriers,
I keep it isolated,
Trap doors surrounding it,
Anything to keep it in the dark,
Hoping it will never be unleashed,
But in the end,
Its able to break though,
Only to return to me,
Torn into a million little pieces,
And i get stuck trying to put it back together,
Night and day weeping,
Trying to put the pieces of my shattered heart back together,
With tears of sadness and hate as my tape,
Why must i have a heart that is cursed to suffer?