The Rules of Attraction (film)

The Rules of Attraction is a 2002 black comedy film written and directed by Roger Avary, based on the novel of the same name by Bret Easton Ellis. It stars James van der Beek, Shannyn Sossamon, Ian Somerhalder, Jessica Biel, and Kip Pardue.

The plot then moves backwards several months and explores the love triangle between Lauren, Paul, and Sean. Misinterpreting Seans friendliness, Paul mistakes him for a homosexual and makes several advances to which Sean is apparently oblivious. Concurrently, Lauren also finds herself attracted to Sean despite saving her virginity for her traveling boyfriend, Victor. Sean reciprocates her feelings, and assumes the anonymous, purple love letters he has started receiving are from her.While Paul is visiting his friend Dick, Sean is seduced by Laurens roommate Lara, who tells him that Lauren isnt interested in him because she has a boyfriend despite having sex with Lara, however, Sean regrets it and realizes that he is in love with Lauren. It is then revealed that another, unnamed girl is the author of Seans love letters after seeing him leave the party with Lara, she sends him a suicide note before cutting her wrists in the dorm bathtub. Lauren, finding Sean with Lara, runs to the girls bathroom in anger, only to find the unnamed girls corpse, leaving Lauren extremely distressed. Sean, still believing Lauren wrote the purple letters, misinterprets the suicide note and assumes Lauren never wants to be with him. ........

Source: Wikipedia