Well I am a big fan of poetry and as my 2 friends above have said, you did a very good job. Everything is coherent, no grammar mistakes, the poem flows nicely.
I like these lines:
"I fold my dreams into little pieces"
"A day happening in theory"
and I like the metaphor of the heart/envelope.
You should write more and post it on here, I would be happy to read it. I'm too ashamed to post my own poems
though my style is more visual and my expression of self is done more through symbolism than metaphors. My poems are a little less macabre than Poe and much less depressing, but I would say he's my biggest inspiration.