Je t'aime moi non plus (1976)

Petite waitress Johnny works and lives in a truck-stop, where she's lonely and longs for love. She develops a crush on garbage-truck driver Krassky, although her sleazy boss Boris warns her that he's gay. Maybe because of her boyish looks, Krassky likes her too. Neither notice the growing jealousy of Krassky's boyfriend Padovan--until an escalation.