Who am I?

I often hide where darkness reigns ~
I take great strides but make no gains
I have no dreams, I just don't sleep ~
I never laugh, nor do I weep
I have no faith, I won't confide ~
I don't make plans, I can't decide
I cannot trust, I can't believe ~
I'm never open to receive
Though my strength is sometimes faded ~
I'm not one to be persuaded
I could be right, but never wrong ~
I'm often short, but not for long
I don't recall, I can't forget ~
Afraid?... I haven't worried yet!
Is this life about reflection? ~
Have I gone the wrong direction?
I'll never hope to change my ways ~
I'm never worthy of your praise
I have no voice, I get no say ~
I have no mind to get my way
I just can't think, I just don't learn ~
I'm often hardest to discern
I have no heart, don't care at all ~
Sometimes it seems I'm ten feet small
I often touch but can't embrace ~
I don't feel love, that's not my place
I have no joy, I'm often dull ~
Just a sort of empty full
I do not yearn, I just don't pine ~
I never have to toe the line
I do behave, if for a while ~
But you will never see me smile
I have no need of company ~
Pity the one who is like me...
If I were you and you were me ~
You'd be a shadow, I'd be free.