Lancelot and Merlin is the healthiest relationship on the show. Seeing Merlin so unafraid to be around Lancelot and be able to show his true self is a beautiful thing. He even hid stuff from Gaius all the time. When Merlin was with Lancelot, it always seemed like that huge load on his shoulders disappeared. This friendship was so refreshing.
Lancelot accepted every part of him and he died for him. Lancelot didn't want Merlin to sacrifice his life for Arthur so he chose to take his place. HE DID IT FOR HIS FRIENDSHIP WITH MERLIN AND THAT IS WHAT MAKES HIS DEATH SO MUCH WORSE.
Also, Lancelot’s face when he sees magic
THIS MAN WAS TOO PURE AND AWESOME FOR THIS WORLD