I also think that JK should have made her and Neville Marry off. Because what was the point of Neville confessing his love in Deathly Hallows if it was just going to be put to waste.
Neville-Luna scene in the movies was never canon though. They just placed that in coz they knew there was a big fanbase who ship them together. :)
(Source: harrypotterconfessions, via taylor-owns-stanny)