Spaced (1999)

The gang go out for dinner to celebrate Daisy's birthday, and Marsha gets very suspicious as Tim flirts constantly with Sophie and seems to pay no attention to Daisy. She eventually tells Daisy that she saw the two of them kissing, leading Daisy to admit that she and Tim aren't really a couple and never were. Marsha is devastated to find out that they'd all been lying to her, and storms out of the restaurant and then the flat.