Should I keep her as my friend?

Okay so I told my friend Leah I kinda act like a vampire (I hate the sun, I can play Beethoven on the piano without even learning it first, I'm a freaking super genius, I am pale and have black straight hair, and I can run scary fast and not get out of breath) and I told her not to tell anyone and she went and told all of the girls that I told her I am a vampire and I have fangs and all that crap.she kept saying I'm sooo sorry but now all of the girls are pissy at me and are talking crap about me. So I told Leah I hated her for doing that and I would never trust her again and I dont know what to do....