Uh, without being there, without anything other than what you've said here, my guess is probably the same as yours. Did you follow up with her? Ask her what she meant by the "to make more room" comment?

It seems to me that, although most people with eating disorders are ashamed of them, it's also a relief to have someone ask, to be able to admit to it to someone. If you ask in a way that shows you care, then I think it would be OK. 'Course, I do'nt know as I'd mentioned paying extra for her food...

I read something a long time ago, though, about Eileen Ford telling one of her models that she could continue her bulimia as long as she wanted -- but she (Ford) wouldn't pay for the food. Told the girl she'd pay for all the food the girl would actually keep down, but not to have it wasted that way. So, maybe it would make sense to mention taht, too?

Good luck. Personally, I would think of you as a good friend if you did follow up with her, and maybe even helped her find help. But I'm not she, and I'm not bulimic, so what do I know? (And I'm not sure that someone telling me I"m anorexoric would make much difference to me, either, since I already know that... Guess it depends on how it's done.)