Suicide girl

An unnamed female Camden student (Real name possibly Mary) is a character appearing in The Rules of Attraction (1987). She is an secret admirer of Sean Bateman who commits suicide by slitting her wrists in a bathtub after seeing him and Lauren Hynde leaving a party to have sex.

The Rules of Attraction (1987)
She narrates various chapters mostly through her love letters to Sean Bateman which come up randomly at various chapters and are italicized. Sean presumes that it's Lauren who is writing him the letters but Paul Denton later finds out this is not the case. Her last chapter involves her slitting her wrists to commit suicide which she succeeds, much to the indifference to the other characters.