This isn't something I'd typically like, but I think you did it very well. It's a solid metaphor, even if people tend to overuse it. The only thing I don't like is that these lines didn't seem to flow: "Slowly,/Flowed out, with the blood," The rest is tight.

I feel the exact same way...and when the heart freezes and cracks, the pieces are sharp enough to cut anyone who tries to get close.

this was very, unhidden and open.

good and bad to that.

but i think it gives the reader the idea of defeat when it speaks of self mutilation.

i don't mean to be rude... so excuse me if you feel attacked.

overall, it was okay, but I'm sure you can do better.

peace&love

-N