If a person goes from a long period of eating more than average, like a year or so, then suddenly decides to go on a diet. In the course of the diet, she gradually finds herself decreasing her food intake, then becoming very picky. Whenever there is a super seldom instance that she eats a big meal (like a bowl of spaghetti for example), she couldn't stop feeling guilty, and will buy a diet pill like a xenical (orlistat), or some laxatives. And the cycle goes on and on. I can't decide if she's manifesting bulimia or anorexia. What do you think this eating disorder is?

other details:
the girl was a chubby kid, then lost weight during college

then gained some weight back again,and trying to lose it again using unhealthy methods
she often tells me now that if she starts to eat normally, she'll be that fat kid again.