hmm...normally i absolutely despise first-person narrative stories, and get frustrated from reading them about 3 minutes in, but this one is actually pretty good, and im enjoying it. i hope u finish working on it soon, cause i think im gonna be through the rest of the story before i go to sleep tonite...:P
anyhow, it seems a bit odd, the way u introduced ginny into this...from your description, it sounded like he would be engaged to a muggle only to have ginny come back or something causing an awkward triangle...haha.
that's just me nitpicking. anyway, awesome first chapter!!