Darn right there will be many, many days of you two being dumb boys. Gahhhhh, I loved this. I did. Merlin turning immortal because of vampiricism, how /Merlin/ he still was refusing to drink human blood and keeping from large groups of other vampires, fighting his demons. And Arthur's had a pretty realistic reaction of wariness and grief. Great work!

Wow, this is a new twist to the story, one that I hadn't read before. Great job! :D