How to lose weight?? -

my friend has an eating disorder she eats when shes bored, tired,hungry,sad and so on, she went to go see someone about it and they said she has an eating disdorer how can she lose weight,and be able to stop her self from eating after 9pm?.. she is 15 and weights around 180 pounds

Tell her to drink a lot of water ( 6-8 glasses), its good for her and fills her up.