Is seeing my bloody valentine in 3d recommended to someone who faints at the sight of blood?

Ok I am 13 and my best friend and her boyfriend and i are going to go see my bloody valentine 3d (dont worry her boyfriend's mom is coming and watching the movie with us) and well..... i p out a lot. If i hear the word blood or someone describes it or if i have a nose bleed i p out. I really dont want to see this movie because I haave never seen a horro movie and dont enjoy them. I also had to lie to my parents and say we were seeing Coraline in 3d instead and then going to c this movie. I really dont want to see this movie becuase i wold rather see confessions of a shopoholic instead. Also, i dont want to feel like a 3rd wheel on her date. She will probably endup ignoring me and i want to have fun. What should i do?