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I saw this movie at least 4 years ago on HBO do not know the names of the actresses. It takes place in an all girl school with a neighboring all boy school nearby. The 2 main characters who are girls start sleeping together they have they own room which is shared with one other girl. The 3rd girl knows of the affair but acts like she sees nothing. One of the girls has a younger sister who also goes to this school and the yunger sister along with a friend walks into her room one morning and catches them asleep together. The girl then stop seeing the other and starts dating a boy from the neighboring school. There is a dance of some sort and the girls father arrive and the girl who was dumped tries to cut in the with the girl dancing with her father and is snubbed. She then clims the roof of the school and jumps off committing suicide




LOST & DELIRIOUS (2001 - Léa Pool)

Starring Piper Perabo, Jessica Paré and Mischa Barton.
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