This is from the Dolly Parton tribute album.
This song is off of Dolly Parton's 3rd bluegrass album Halos & Horns

Oh,you're out there tonight with another
And my pain is so dreadfully sharp
I picture you with her and shudder
It's like a dagger through the heart

Do you think that my feelings don't matter
Or your cheatin or hurtful remarks
When you leave me all broken and shattered
It's like a dagger through the heart

(chorus)
Oh I know I'm a fool to keep staying
When you've made hurtin me such an art
Tossed around like a used box of crayons
It's like a dagger through the heart

Oh you've cut me to pieces so often
Like a knife or a poisonous dart
I would be better of in my coffin,yes
Like a dagger through the heart

(repeat chours)

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