I hate to be "that guy", but a few lines of your poem are pretty much copied off of this... a poem that's been circulating the Internet for a while.
"She paints a pretty picture,
But the story has a twist,
Her paint brush is a razor
And her canvas is her wrist,
She paints her pretty picture
In a color that's blood red
While using her sharp pain brush
She ends up finally dead
Her pretty pictures fading
Quite slowly on her arm
The blood is not racing through her
She can no longer do harm
She painted her pretty picture
But her picture had a twist
You see her mind was her razor
And her heart was her wrist"
http://www.quotev.com/story/2163808/...tty-Picture/1/
http://kupika.com/diarypage.php?id=b4e1faa434e33abj2hn0