Evolving Thoughts

"Who am I?"

I disappear at night when you're tucked in tight,
I see your future, visit your dreams,
do all of the unspeakable things.

I follow you everywhere,
whether you see me or not,
And, oh, look here I am,
right in your spot.

You may tell me secrets,
dark or happy.
But it's the pieces that connect
that have the greatest effect.

Leaving me is not an option
because I'm always here,
Even if you don't notice,
Or possibly care.

I'm not hard to miss,
no matter where you look.
I'm always there,
even if it's a little nook.

We are twins, the exact same,
Even with our crazy mane.
We seem alike on the outside,
But on the inside, even I can decide.

Being me is pretty easy.
All I do is follow you.

Can you guess who I am?
Maybe you already know.
So here it goes,
Of course, I am your shadow.