What does this poem mean.

You took the blade from my gored form
Wraped it in barbwire
And in the fire of you passion it did turn
Cherry red
And so you fancied it a diamond
A million facets did exclaim gleefully
Flashing bloodly light as
You placed it so lovingly
...

Between my heart and lungs
So that I may suffer
Even in death.

What does this mean?

its basically saying that someone broke there heart key the line you placed it so lovingly between my heart and lungs. the author is upset that someone they loved had broken up with them and so forth.