My favorite story was about a boy who'd live forever but his eyes were heavy with the weight of all he'd seen. / The opening lines from the Doctor Who episode "A Town Called Mercy" for Merlin. This fits a little too well.
Bradley and Colin. This if friendship Or love. Either way, they have a good friendship/relationship. I don't ship them, either as Bradlin or Merthur, but they have a bond that can't be denied. Brothers from another mother maybe?