I think what was neat about this was the hint of Duff you gave in those opening paragraphs - just the way he seemed to be reacting to her presence, it felt like he definitely felt something. :) And I like how you brought that up in the end, and how it was resolved so there was no cliff hanger of him left totally broken hearted and such. One thing I noticed was that Zia seemed way too casual about things - and that might very well be her character. If it was, then I think a little more character development would have come in handy, and if not - then I think maybe more description needs to be added to make it sound a bit more serious. Other than that, it was a nice sweet piece. :)
You portrayed the emotions and grief in this really well! When it said she felt like her heart was breaking, I could feel mine breaking, too; this is super powerful. Your way with words is astounding, dude. It saddens me that she leaves him, though. :\ Ah, well, it's incredible anyways. :D Nice work!
"How Did I Ever Let You Go" Out of 100 points you got 88
-This is just a breakdown of your points. For the song fic catogory you got 25 out of 30, you did a wonderful job of relating to the song but I did think you could do better.
For the plot, you got 30 out of 30 points possible. Even though it was a oneshot I loved the ending. It hinted that in fact it might not be over and you did a wonderful job of capturing the emotion between Zia and Duff
The layout was awesome, and easy to read. So you get another 10 out of 10 points. The grammar was good. I did find a few little grammar errors here and there. So I'm giving you 18 out of 20 points.
I liked the title. It fits along with the story without actually giving anything away.So that gets you another 10 out of 10 points possible.
Wow. Way to make me suicidal. Now I want to die, just because she left Duff. Why the HELL did she do that?! Crazy bitch. I hate her. Die, Zia, DIE! But this was good. Way to capture the emotion. :]