Can I Bring A Friend (metro)

There is a voice that’s deep inside me
It’s right there in my head
It has control of what I do
And everything that’s said
I don’t always like what it makes me say
Or tells me how to behave
But I can’t make it go away
no matter how I’ve tried
So before you ask me out with you
Can I bring my friend

Image from: http://www.wikihow.com/Make-a-Friendship-Bracelet

Entry for: OYM (metro category)