This truly is a sad poem. Very emotive and wonderfully written.
Editing good too. One line missing a comma at end, but very well done. :)
The suicide undertone is concerning - sounds like you have been reading Romeo & Juliet with our Year 9s ;) Actually, I would probably change the suicidal adjective in opening stanza to something more about the actual appearance of cuts. Or even remove that line. The poem is already sad, but that takes us to a scary place.
You write emotive poetry so well though. I hope you are going to include some of your funny/cheerful poems too. :)
βIt is amazing what you can accomplish if you do not care who gets the credit.β β Harry S. Truman