I saw a movie a few months ago and I can not remember the name if it. The movie is about a couple who is engaged to be married. The girl is cheating on her fiancé with one of his friends. The man that plays her fiancé has long black hair and is a horrible actor. He is the director and he has been on Tim and Eric awesome show great job on adult swim. I think I actually saw the movie on adult swim. During the movie the girl plans a party for her fiancé and this is when he finds out that she is cheating on him with his friend. At the end of the movie he kills himself in their bedroom and his fiancé finds him. This movie is full of bad acting. Most of the movie takes place in their apartment and on the roof top of their apartment. I have been searching for this movie and have yet to find it anywhere.

You are thinking of the semi-legendary The Room (http://www.imdb.com/title/tt0368226/), "starring" Tommy Wiseau (who also wrote, produced, and directed this movie).