I've been looking for a specific fic for a while now. I remember I had read it on ffnet a long time ago.
It was a reveal fic.
Arthur had found out and had reacted poorly. He had refused to talk to Merlin, and I think after some time, Merlin just gave up. He wouldn't eat or drink, he was slowly fading away.
If I remember correctly it was Morgana who persuaded Arthur to finally talk to Merlin, and Arthur had been horrified when he found out about Merlin's illness.
I think there is a similar fic where Merlin fakes illness to make Arthur forgive him after a magic reveal, but it was not the same story! (just to be clear)
I really hope that someone will be able to help me with this one.
Thanks in advance :D
PS: I hope I didn't mess up the tags! Sorry, first time posting!
EDIT : FOUND by the lovely sesshouluver.
"Cast Me Gently Into Morning" by BeyondTheStorm