So there is this adventure seeker type of guy who meets this girl and they soon fall for each other. She dates him and she soon realizes that all his past girl friends have died and she begins to wonder if he has killed them, she decides that yes he has all the while she becomes friends with a female friend that he has and the main girl confides in her at the end of the movie she realizes that it wasn't him killing all his girl friends but his jealous female friend who then goes after his current lover. I think that at the end he finds out what she's been doing so he stops her by killing her.

Thanks!!