Dear SingaporeMacross, you are really too humble. 
You have skilfully made used of poetry concepts such as similes,
i.e. where Love is Like a spy
, personification, i.e. My tunic
drinks
, etc. Your sentences are clear, straight to the point
like a dagger drawing blood. 
I notice your writing style is quite similar to LazerLordz and
eskyhastofall. Both of their poems challenge my imagination.
Though really unnecessary, but if I must improve' on your poem, I
have a few suggestions.
Firstly you might want to divide the poem into different stanzas
maybe three i.e. four lines per stanza. This will appear more
organized with the beginning and ending of each stanza implicating
a change of emotion, direction, etc. This will assist your readers
in better understanding the poem. How you wish to divide it is
entirely up to you.
Secondly, I notice the last word of the 10th line rhymes with that
of the 11th line i.e. lust with rust. Personally I see nothing
wrong with that. But according to some poets from another forum, if
most of your lines do not rhyme, then try keeping it this way
especially if they are very close with each other.
Lastly, you might consider spicing up some of the lines for
example,
My tunic greedily drinks the blood I leak or
The icy blade draws in
These are just some suggestions; the idea is not to overdo it.
Come to think of it, I notice this poem seems to have a religious
touch with words like love, lust, sin and maker. With a bit
of imagination it might even be rewritten into a religious poem.
