It's very good I think. Very good. Poems like this are a bit dense for my personal taste. I mean for reading.
When I do read it, I picture it more as a spoken piece. I think it would be great for that.

It's a lovely sentiment.
I like the writing of the first part better than the second part.
Finally, I can't avoid the logical bump that you are wishing the person you speak of dead before you though. ;-)
Which just leaves me with this crystalization... I love you and I want you dead. ;-)
No offense I hope. I really enjoy so much of it.

Some part struggle a bit, others are just brilliant. The marble and rose thing particularly very nice. Thanks