Doppelganger (2015)

Jack is a hapless young man unable to find motivation or inspiration in anything. His relationships are in a perpetual state of slow decay, and he has fallen into alcoholism. He begins to be haunted by his silent, yet aggressive, double. Jack quite soon realizes that he is alone, as his sister, his girlfriend, and even the director of the film are not on his side. Jack resolves to figure out and confront his double, or else be destroyed by it.