Oh get over it already, you locked lips with a guy. Oh woe is me. If a chick kissed me, I'd kiss back just for the hell of it.
Fact of the matter is...you're a girl. You are allowed to do shit like that.
If a guy kisses a guy back, I'm labeling him a ****** and he is goin' on my gaydar and I'm goin' to avoid that guy for the rest of my life. That shit doesn't fly with me.