Heart of stone

And this was also a while ago, the heart.

The heart of stone
Let's no one see
Only shows
What others need
Happiness,
Joy,
Charm,
And smiles
Really dying inside all the while
The heart of stone
Hard,
Strong,
Cold at first
Hold it long,
Love it
Slowly,
Barely,
You feel the change
The heart of stone
Gone,
Replaced by something strange.
Emotion?
A soul?
Only it can tell
Give it time and it could change you as well.