Honestly, if someone that I knew wrote something like that, and I knew were they lived, I wouldn't hesitate before calling 911 and getting a unit there pronto. Every suicide letter that I've been forced to read for various classes and training sessions has the same tone and that freaks me out a little bit....
you wanted an honest opinion, so that's mine.
On the other hand, if I knew that the person who wrote like that was just using it as a creative outlet and writes such things frequently it would be different.
What am I trying to say? I'm tripping over my words

If someone seemed like a normal happy person and suddenly wrote something like that, anyone would be perfectly justified in trying to get that individual professional help. BUT, if that is how you vent your creativity, then more power to you. It really is beautifully written.