Three of Hearts (1993 film)

Three of Hearts is a 1993 comedyromance film directed by Yurek Bogayevicz and starring William Baldwin, Kelly Lynch, and Sherilyn Fenn.

Connie is desperate to win Ellen back and Joe volunteers to break Ellens heart to convince her that heterosexual relationships are inferior to lesbian ones. The hope is that the disaster will cause her to return to Connie. Neither counts on Joe having feelings for Ellen nor expects her to discover the trick.

Source: Wikipedia