Hi, with the pressures of school exams and coursework there is no wonder that some friends may begin to behave differently around food.
Eating disorders are outward expressions of coping with emotional and psychological issues. People of all ages can develop eating disorders. So, if you have concerns about your friend's attitude towards food please tell someone you trust straight away.
It's not 'dobbing on someone' or 'grassing' you would probably be saving your friend's life.