Love it! You wrote Neville very well with this story, and your OC Grace didn't come off as a Mary Sue like most OC's do. Just a few grammar issues I noticed (sorry if this is a bother, but I'm in the Beta Guild)...
'After she had left the room, Neville sighed deeply ' This sentence near the top of the page needs a period at the end.
'“Distraction or not, Neville, you’ve got to tell her how you feel, she went on.' This sentence a little farther down needs quotes after the comman and before she.
I love the ending with all the engagements and weddings, and what Ginny said about Voldemort is very profound. 10/10.
I loved it!!! it was so sweet and the ending made me tear up! You're a great writer.
Well, not to be harsh or anything, but it's pretty standard. Has a very "neat" ending without a whole lot of plotline or detail. Not the best.