Fili/Kili (NOT RELATED), Thorin/Bilbo. They met as two orphans in a group home in New York City and promise to be brothers forever. Kili hates himself for screwing that up by falling in love with Fili. (Or how Kili first brings together his family and then is afraid he screwed everything up.) Slow burn.

Thorin survives the Battle, but finds he cannot be King Under the Mountain after everything that's passed. So, in order to learn to live, Thorin decides to die. Or at least, to kill the King. By Thorin's command, he becomes dead to the world, save a few chosen ones, and to Bilbo Baggins. Until one day danger brings Thorin knocking at Bilbo's door and a whole new journey begins.