Heavy

Victor is a cook who works in a greasy bar/restaurant owned by his mother, Dolly. It's just the two of them, a waitress named Delores, and a heavy drinking regular, Leo. But things change when Callie, a beautiful college drop-out, shows up as a new waitress and steals Victor's heart. But Victor is too shy to do anything about it, and too self-consciously overweight to dream of winning Callie away from her demanding boyfriend, Jeff. Victor's terrible loneliness overwhelms him when he has to face losing what he loves the most.

Heavy is a 1995 independent drama film directed by James Mangold, and starring Liv Tyler, Pruitt Taylor Vince, Shelley Winters, and Deborah Harry. The plot focuses on an overweight, middle-aged man (Vince) whose life is forever changed after an enchanting, college-aged girl (Tyler) attains a waitress job at a roadside diner where he is employed by his mother (Winters). The film's themes include loneliness, false hope, unrequited love, and the problem of self worth.

Source: Wikipedia