The Room (2003), produced by Tommy Wiseau

Johnny lives in San Francisco with his fiancée, Lisa. Lisa does not begin an affair and is faithful to Johnny, but Johnny is paranoid that she is cheating on him after watching an episode of Dateline. He begins recording her phone conversations and watching her every move closely, determined to collect evidence. Johnny has convinced himself that Lisa is having an affair with his best friend, Mark.

Johnny and Mark rescue Denny from a fight, and Denny tells Johnny that he thinks Lisa is cool and a good match for Johnny. Johnny misinterprets this as Denny telling him that he lusts after Lisa. Lisa later witnesses Johnny kill a bug and says she thinks it's violent and unnecessary. She tells him she wishes he would've released the bug outside. Johnny becomes convinced that Lisa is calling him violent and abusive, and he is devastated.

Johnny and Lisa later have a conversation, and she decides to end things with him due to his lack of trust in her.

At the end, it is revealed that everything that happened in the original movie was taken out of context. Johnny was an unreliable narrator in the original, and this is how things actually went down.