I'm worried that my friend is beginning to fall back into her old anorexic habits?

Anonymous
We've known each other for a long time, and are now roommates in college. I've known about her being anorexic in our Freshman Year of high-school, however, she managed to overcome it on her own. Now, I'm worried that she's falling back into old habits. Her spiral started when her boyfriend of 3 and a half years told her that he 'still loves her, but would love her more if she lost some weight'; the thing is, when they started dating, she was anorexic. She got over it, gained weight back not only from overcoming the anorexia, but also because she got older and gained weight naturally. So now, the reason I'm worried for her currently go as follows; she's gotten a calorie counter app, has started eating less (like tonight for dinner, she ate only a little bit of a breadstick, about 10-12 brussel sprouts, and maybe 2 bites of her salad, if that), and has started exercising a lot more. Her eating less has definatly been something I've noticed, and she's reduced her portion sizes by almost too much. I'm not going to say anything, because that will just start arguments, but I am watching her. I'm extremely worried for her, and don't want to see her fall back into her old habits. How can I handle to situation, what should I look for, etc. in order to try to stop her from potentially falling back into her old anorexic habits.
I'm worried that my friend is beginning to fall back into her old anorexic habits?
3 Opinion