My friend are pressuring me to.....?

Get back into my original pattern of not eatingI'm 16 and I have been struggling with anerexia for quite a while im 5'4 and I weighed 100 pounds I started treatment for it and now I am a better weight 126 It was quite a grueling experience I'm back in school and I don't want to fall in the same pattern the friends I hang out with always call me fat and are anerxic themselves I don't know what to do I didn't eat the other day :( please help