It Happens in Roma (1955)

Renata and Carlo covet the same apartment in Rome. They quarrel at first, but Carlo finds an original way out: what if they married and shared the place? Renata agrees, on one condition: she should be allowed to keep trying to find the man of her dreams. For a while suitors follow each other, each time ridiculed by Carlo. Things get harder with Dino, a more serious rival. After dallying with the charming young man, Renata winds up realizing that it is Carlo she really loves.