L'Amour trop fort (1981)

Max is an old and unsuccessful actor while Charlie is an ambitious young director, yet they are bound together by close friendship. Until the day Rose-Marie, a rather conservative young antique dealer, walks into Charlie's life. When Max's wife walks out on him, he clings to the young couple like ivy. However he soons becomes a dead weight and Rose-Marie threatens to leave if Charlie doesn't choose between her and Max.