"..." This really is his fault for trying to cut and run without making a big thing of it- in downplaying the situation he's only made the fact that something is up more rather than less obvious. But symptoms are starting to show here and there an he wouldn't have been able to hide it long- moreover?

Leonard reaches for a glass, staring down into the warm amber of it rather than looking Jim in the eye. "...I'm unfit for duty, Jim."

Leave it at that. Please, god, let him leave it at that without making him go into details. Jim won't, Leonard knows he won't, but no small part of him is quietly, achingly hopeful they can just- have a last drink, maybe a few days, and he can send Jim on.

It's a pipe dream is what it is