It isn't. [Lonely, that is. Sousei just tilts his head in response to that, giving Tenka a level look in response. He doesn't suck at human interaction, okay, he's just not interested...!]

I intend to continue to devote my life to protecting our country. [That's enough for him.

... but yeah, there's that.]

There will be time to try harder when we have succeeded at the Yamainu's task. [And the Orochi is gone...then he'll think of other things.]