Halloween Frat Party Nightmare

I am headed to by boyfriend's Halloween Frat Party with my roommate. She's going as a slutty cheerleader, while I'm a sexy witch. She seems really eager to go, probably because she's a slut in real life, but I'm going just to support by boyfriend since he's setting up this party for his frat..
(public outdoor sex, monster rape, cheating, college party, accidental drug use, strange romance)