Read The Evil Lady's Hero Manga:
So I've become Yunifer Magnolia, the villainess who's crazed with jealousy because Duke Ishid Lucrenze, the devastatingly handsome hero, has eyes only for Raelle, Yunifer's best friend. Yunifer torments Raelle so much that Yunifer's killed off at the end.
But, I'm Yunifer now. Good news is, I've reincarnated before her tragic end, so there's time to make sure Ishid and Raelle have a fairy tale end more.. ing (and I stay alive). The bad news is, I got drunk and woke up with Ishid next to me. Crap.