i know how u can help her but she might not like you for a while.start off by telling a school psychologist. if he can talk to her and maybe find the reason shes doing this, then things MIGHT clear up. eating disorders are very tricky.another thing to do if that doesnt work is to let a guidence counselor know what she is doing, and have them call the parents. the parents should then confront her about her issue and get her the proper help. i suggest you do this asap, eating disorders can really fcuk up your life once you get older. the effects last a lifetime. major health problems like heart problems, stomach ulcers, and disrupted hormones and reproductive difficulties could spring up in her future if she does not get help.its nice to see how concerned u are for ur friend. good luck!