[Nah, brothers are special. Locke's just trying to make sure the kid isn't scared entirely out of his mind, and is somewhat prepared for what's coming up - fear can be a healthy preservation instinct, but fear on top of everything else might well get him hurt, or worse.]
Think you'll be okay, then? [He isn't going unless he actually believes the answer.]
[Action] dude you've been killing yourself repeatedly, don't worry about it
Think you'll be okay, then? [He isn't going unless he actually believes the answer.]