Merlin has a girlfriend?

Merthur. During Merlin's absence, jealous Arthur is tortured by his suspicions.
Events take place at the end of s5ep08 and a little bit after it. Mostly gap fillers. There are also would be some outtakes and flashbacks.

Slightly AU because Arthur and Merlin are involved in a secret relationship that started somewhere between the second and third seasons, and in some scenes Arthur behaves slightly differently from canon. Possessive Arthur.

Please forgive me for the length of my chapters, just couldn't stop writing. Also I am sorry for any mistakes I have made.
Italics for thoughts and recollections

Rated M just for a precaution, nothing explicit is presented.
Merlin belongs to BBC, I do not own it.
I write just for fun.