I don't eat lunch at school nor do I eat breakfast. I don't get hungry that much. But I would sit her down and ask her about it. Don't try to insult her though because Anorexia is a hard subject to talk about. Most people don't understand it or why people do it. Watch her habits.
Here are the signs:
- dramatic weight loss; refusal to maintain the minimal normal body weight for one’s age and height
- basing self-worth on body weight and body image
- frequent skipping of meals, with excuses for not eating
- eating only a few foods, especially those low in fat and calories
- making meals for others, but not eating the meals themselves
- frequent weighing of oneself and focusing on tiny fluctuations in weight
- wearing baggy clothing to cover up thinness
- excessive focus on an exercise regimen
- frequent looking in the mirror for flaws
- avoidance of social gatherings where food is involved
- even when thin, complaining about being overweight
- in females, missing three consecutive menstrual periods; in males, decreased sexual desire
These are just some. But they are the major ones.
Goodluck. PM me if you need anything.