a prison made of me (an original poem)

I wrote this just now, on the spur of the moment. I'm not much for poetry but sometime it just jumps out and this is it.

so many thoughts in my head. Help me. Its screaming in my brain, scratching, clawing its way out. But its caged in. Im caged in.
Its all a prison made of me
 Im my own worst enemy.
Recalling every bad thing said.
Every judgmental thing in their heads,
spewed at me the easy target.
They'll never remember and I'll never forget.
help me shed this second skin
thats shrinkwrapped on, im wearing thin.
 but the skin grows stronger with each day,
keeping sanity at bay.
Sane thoughts and actions would not do
 when this thing inside me wants to rule.
 take less, do more it says to me.
 or no one will love you it says with glee.
 twisted in a sneering smile,
this thing inside me used it guile.
tricking, lying our way to thin,
to manipulation, we have to win
the race to be the perfect one,
but who are we racing? i see none.
no one competing for this prize,
just me and this thing behind my eyes.
its in my brain, burrowed in.
its my master as i sin.
 most of the time we are friends,
 i welcome it to meet my ends.
but sometimes when the night is long,
all I want is a lullaby, a song.
 someone to sing me off to sleep,
not a slave driver with an agenda to keep.
so do i let it stay for now, giving in and making vows?
or do i seek help to get it out?
it clings to me and starts to shout.
so today it gets to stay,
i cannot part with a friend this way,
even if it abuses me,
it does give me what i need............