How we cite our quotes: All quotations are from Star Trek V: The Final Frontier.
Quote #1
KIRK: And, even as I fell, I knew I wouldn't die.
MCCOY: I thought [Spock] was the only one who's immortal.
KIRK: Oh, no, it isn't that. I knew I wouldn't die because the two of you were with me.
Although this sounds a bit emo, it's Kirk's way of expressing how much he relies on his crew—and Spock and McCoy, in particular. These guys have been together for decades, after all. As we'll see, their experiences together have transformed them into a little quasi-family.
Quote #2
MCCOY: All that time in space and getting on each other's nerves, and what do we do when shore leave comes along? We spend it together.
Please note that during this scene, Spock, Kirk, and McCoy are on a camping trip together. As Bones observes, this is legit insane. These three men have spent practically every waking moment together for decades. Why would they spend their free time together, too?