The Gates of Paris (movie, 1957)

Juju, a drunken oaf who feels the need of being important to someone---anyone---and his friend The Artist are forced at gunpoint to house a fugitive, Pierre Barbier, in Juju's broken-down home. The urge for being needed is such in Juju that he gives up drinking and takes care of Pierre. But one day Juju finds out that Pierre has been making love to his girl Maria...