"Let's do and say we didn't" sounds like the way they're continuing their relationship. It will be quite interesting to see if they can pull it off (no, Ginny, that doesn't mean what you think ;)) It seems that, so far, they have managed to put it over on Ron and Hermione, who know them the best. It should be interesting to see how Ginny manages to get together with him.
Author's response
Thanks so much for reviewing! I'm glad that you agree that tricking Ron and Hermione would be well, trickiest! (hehehe... that sounds so lame...) Anyway, I'm just about to update another chapter, as soon as I've given it a final editing!