[Given Penny, the better question is not whether she means it, but if she knows exactly what she does or doesn't mean in this context. Some types of self-evaluation aren't her strong suit.]

Then- ...I don't know. I can't NOT go home, but I can't ask you or anyone else to not go home either. And we can't just stay on this bus forever.

[There's probably a few of them who would resort to cannibalism within a day or two, nevermind the seemingly infinite supplies.]

[She tentatively reaches a few inches across the seat to take Cleo's hand.]

I guess. I'd miss you too. A lot. You've been a really good friend. I didn't have many, back home. Just the one.