Eating disorder relapse??!!!!!?

well i hav a friend who moved to our skool last year, she recently told me why she moved-because she had anorexia and wanted a new start. everything was goin great til a few days ago when we started back at school.....nd i'm getting really confused..nd supcioius

a few of the girls noticed that she had lost weight
she looks pale
acting moody at times
going home at lunch time
not wanting to talk bout anyting etc nd i'm finding it really hard to tlk to her
wanting to now everyone elses problems
watching her food nd exercising a lot
not wanting to go places with us
2day she signed up for the football time for the first time ever...

im just dunnno wats goin on...cud it be dat shes havin a relapse r stressed r sumting...anybody no because i dnt want anyting to happen her,

i get on realy well with a teacher at school nd i'm wondering if i shud say sumting r not, i also saw her mother in the school office today but i dunno wat dat was about....

should i still say sumting nd if so how do i go bout it??!!!

we've started a new school yr but its not stressful so i realy dnt no wats goin on!!!!! THANKS FOR ANY HELP!!!! means alot!!!!

depends how old you and her are. If you're not in high school yet, definately tell someone but not her parents who might know already and be in denial, tell a teacher. If you're in high school, I think it would be respectful to talk to her first about it, although people with ed's are great at lying and keeping secrets and feeling threatened when confronted. but you should let her know if you both are high school age, that you want to tell someone.