I agree that she needs to get help as soon as possible. But since she won't have anything to do with it at this point, how about going to the book store and buying her a good psychology self help book, related to the issues she is having? If you do that in a very gentle way and leave it for her at her home, she MAY just pick it up and start browsing through it on her own time, maybe even when she's up all night, which in turn, may put her at ease enough to consider seeing a dr. about it. It sounds like you guys are very good friends, but even so, she may just feel too scared to let even you on to that she may need mental help.