Yours are Mine (2018)

Evin takes on a new high school student to tutor, Ally, and they quickly develop a close, sisterly relationship. After accidentally discovering Ally's struggle with bulimia, Evin is quickly triggered by her own past battles with eating disorders. Evin tries to confront Ally to help her, and must decide to either fight through Ally's defensive tactics to get the help she needs, or leave her to possibly fight this disease for years to come.