Spock took that as permission to pick Jim up, and lay him down on the bed... pulling the covers over the man.
Notice that he didn't carry Jim to his own room.

With only a moment of hesitation, Spock climbed in after, laying on his side facing his Captain.
He knew that not much would be happening, but at the same time....everything had changed. Would their friendship be preserved?
Spock had to admit, the amount of unknowns had him... apprehensive.
"Sleep, Jim."