Merlin & Arthur’s final words (AU) - Stay with me (5x13)

Hey guys!! Well a new au with merthur:D The story: Arthur dies before saying to Merlin that he loves him. Merlin remembers all their moments together and he goes to the crystal cave. There, he sees the future and he understands that he will have to wait hundred of years before he can see Arthur so he is devastated :( when he hears Arthur he thinks he has gone mad and refuses to talk with him but as Arthur walks away Merlin asks him to take him with him. Arthur explains to him that it is not yet his t