I'm not bulimic, and I only knew someone who was personally and closely that lived pretty far away, so someone who has a better clue will be able to say something pretty soon I'm sure.

Things can start out pretty slow, and how long have you been concerned? It could be a bit too early to have really big signs, and you can use a toothbrush instead of fingers so there's no hand signs... blah blah blah. We've all found good ways of hiding things.

About the fatty thing on her hand, is it always there, or was it just there that one time as a joke? My friends and I have some off colour jokes at times, but nothing like that. I guess everyone's different though, you know?

When she eats at 2 am or really late, do you know how much she's eating? Is it just a little snack, or is she grabbing a lot and hoarding food?

I don't know how long it takes to corrode your teeth badly, but I know if you're bulimic and go to the dentist they can tell. I guess you could try that if things start getting worse.

something fishy (http://www.sfwed.org/) has good ways and suggestions of taking to someone who you suspect may have an eating disorder. When asking, you don't make it sound like you're accusing, but being supportive and being there.

Again, I'm pretty clueless about bulimia, so I hope someone else will come along. But I think it's kind of suspicious. I just want to say, that it's not time to get snoopy. If things get dangerous, as it an official diagnoses, the's getting unhealthy, then I think you can start asking friends of her to step in and stuff. But invading someone's privacy isn't a good way to help someone with a ED. It's the middle ground you're going to have to find I think.

Good luck! Feel free to use the forums as much as you need, welcome, and good luck on figuring everything out. It's good if you help EDs in the beginning, because it's such a better rate for full recovery.