Attachments

Attachments is a 2017 teen horror film.

Plot
Max is having the worst time of his life, lives with his abusive stepfather, is endlessly terrorised by the school bullies, and never had a real friend in his because of that. Until cute kindhearted new girl Charlie arrives, she shows sympathy for Max that he experienced and the two immediately begin a close friendship, opening a bright and happier world for Max and he practically falls deeply in love with Charlie, so much so that he doesn't want to let go of that feeling and does anything possible, psychotic and deadly, to spend every second with her forever.

Cast
Kodi Smit-McPhee as Max

Abigail Breslin as Charlie

Casey Affleck as Matthew: Max's stepfather.

Dylan O'Brien as Jacob: Charlie's long-distance boyfriend.

Will Poulter as Wade: School bully.