you do what must be done (for your friend and yourself)

Bilbo returns, to his empty house, with an empty heart. But he is good at doing what must be done. And the world should know, the world deserves to know (Thorin deserved to know), the truth. So he clears his throat and chokes out the words, forces out, "He was my friend." (Bagginshield, post-BoFA movie spoilers)