I'm A Straight Girl, But I Love Kissing Girls

As a straight girl, I always thought I was into guys. But then I had a drunken makeout session with a female friend and it was electric. Now I can't stop thinking about kissing other girls, even though I still find guys attractive. I'm confused and feel like I'm living a double life. I'm not sure if I'm bi or just experimenting, but I'm scared to talk to anyone about it.