Every second I live
is the second I'm dying.
^^These lines were too simple for a start..
I would suggest if you'll rephrase like:
Every second I live coincide
with every breath of me, dying...

I've been praying and yearning for many years
for the one thing everyone has over me.
^^I think it would look good if you'll remove 'and" between praying and yearning and replace it with a comma, plus the second line was not conveying any emotion pertaining to the first line.

I've lost much of my humanity
to the constant pain and torture
of suffering and depth in the shadows of my domain,
the dark.
^^These were my favorites lines from you. I think it was flawlessly written.

Every moment I regain that heart
is always slashed
by the dagger of the demon.
^^I think the repetition of the word "the" was not necessary.

The above suggestions were just my opinions and not necessarily to be followed.This piece was actually ok, i thought you might like some ideas from others.

What a very heart wrenching piece you have penned.

Every second I live
is the second I'm dying.

This lines really hit me....I can relate.

I've been praying and yearning for many years
for the one thing everyone has over me.

The warmth and value of true love
from family to beyond.

Sometimes even when you have them you can feel alone.

I've lost much of my humanity
to the constant pain and torture
of suffering and depth in the shadows of my domain,
the dark.

These words really grip the readers heart. How many of us suffer in the dark?

Every moment I regain that heart
is always slashed
by the dagger of the demon.

Whoever and whatever I touch
dies in an instant.

I have this feeling that everyone and everything I love goes away. You did a wonderful job on this piece.
I really enjoyed the read.
Take Care
Cindy

"What I do
is to insure that no one gets hurt
because of me
and suffers the deaths I've endured". This shows you'd a kind heart towards other but very hard with yourself. Your writings are great. Keep it up, 5:5, kel.