Great poem!

I know that feeling... well written...

Sublime! (Of course, I could be biased because I like dark beauty.)
But psychologically, there is a huge difference between chronic cutting (like what I'm prone to), and slashing one's wrist with the intention dying. This poem seems to describe the latter. You should use another term besides "cutting" in your summary.

-music in the background- You can make a song out of this...but to the poem: Excellent as always.

I've never seen that particular imagery used before. It is very interesting.
I'm not sure I like the use of the word "tiredly". I think it may detract from the otherwise consistent tone of the poem. But that is just a personal reaction.
"Metal kissing soft skin" -
That's just genius. I love that line.

Powerful, I can totally feel the sadness and longing. Great job.