[Supernatural Fic] What Am I?

Warning... um.. existentialism? I'm not sure if this fic actually gets across what I wanted to get across or even makes any sense, but I've gone over it so many times, that I decided I'd better put it up or I'd never stop fiddling with it. (Seriously, I can't stop. I just changed 5 things while trying to post it)

Title: What Am I?
Characters: Castiel, Sam, Dean
Rating: G
Genre: Angst, Character Study
Word Count: 1446
Spoilers: Vague spoilers for season 5
Summary: "But I am not human. It is not who I am. I am an angel. Or at least I’m supposed to be."

( What Am I? )