Where am I?

I'm here,
Just next to your heart,
I've never left you,
Not even once.

All you had to do was,
Look,
And you'll find me,
Reach for me,
Lets pour all your heartache,
Then you'll be free again,
Lets try to mend your broken heart,
So that it can be whole again.

There's not much that I can do,
But i'll do my best.

Then again,
What are friends for.