Playing the Heartstrings

I wish that you would understand,
You put me through hell,
I can't forge a smile on demand.
You look me in the eyes and grin curtly,
Like the devil just shook your hand.

Face to face you're skin and bone,
Living in self indulged shadow,
But you're fat with pride,
Threatening to swell and swallow.

Whatever good i saw in you,
I can no longer find.
I bet you've done it a thousand times,
Twisting words and breaking minds.

Pluck another heartstring on your way out.
Heaven knows how it's still beating.

Pluck another heartstring on your way out.
Please tell me, is it still beating?