now, this is what I call a great fic!! You did a wonderful job at filling the space from Lily hates James to Red likes him... the mistletoe is a great idea to give them more time and less space for this transition!
Bottom line, I just loved it!
Aww. That was really good. And the embarising moments, priceless. It sounds a little like Ron and Hermione to me, be I guess James and Lily's situations are sorta the same with Ron and Hermione's. Very good.
I really liked your story. It was great that your plot gave them time to talk, to connect. And I've always gathered from canon that James heart and character were true, despite his outward appearance at that age. But you remembered to make him still a bit cocky and annoying on the surface, yet loveably so. Well done! Kudos to the song lyrics too!