You're content with my abscence

You don't see the missing piece in your puzzle like pictures.
You don't see the saddness that I feel knowing that the empty space is where I am supposed to be.
You don't see the regret.
Am I that easy to forget?

I see the pictures.
I see the smiles.
I see that my abscence doesn't affect it.
I see that I'm easy to forget.