Tick Tock

My heart signals the passage time.
This unforgiving heart of mine.
Each beat a tick tock.
Each one a pulse from an impatient clock.
It fills me with yearning for a future long gone.
It fills me with fear, for the unfinished song.
It fills me with feelings that I've never had.
And my head with futures that all end up sad.
Dispite all the tales that a heart makes one glad
Mine simply signals the passage of time.
This most unforgiving heart of mine.