Searching for the name of the movie that deeply effected me as a kid

As the title suggest this is about a movie I'm desperately looking to watch again, i first watched this movie probably when i was about 12ish i guess I'm 20 now and for the past 1-2 years whenever i try to empty my minds from all the shit around me i get lost in that movie's scenes even though i don't exactly remember it lately i have started to feel like this movie may be the root of my anxiety or even depression. Anyway some things i remember about this movie is it was about a autistic teen gamer who faked his own death on a boat trip while recording it with his girlfriend(?) Who also had psychologic problems i presume. I also think his mother was a single mother and i remember the funeral scene where the video was shown to the people around there. I know this is not a lot to work with but as far as i remember these scenes are in the movie i also reckon this isn't a american movie because i may or may not heard some heavy/death metal music in it. I think there was a real life sized poster of something in his room. I remember the protagonist walking in the rain with a dark setting around listening to music(?) Or screaming. P.s im not so sure about the years

Edit: question flair might be more appropriate but since I'm talking about events that happened in the movie i think its good

Submitted September 20, 2017 at 02:57AM by YojG http://ift.tt/2jJFRkN