[I can hardly breath] breathe

Great emotions in this. I love that the speaker keep coming back to this feeling of emptyness - he/she knows this is the right thing, but there's still something so inherently wrong about it that can't quite be described. It really emphasizes that emotion that this whole poem never really reaches a conclusion about that. Great ending, too. It's an idea that you hadn't introduced earlier in the poem so it really hits the readers.