You don't need to find a bi girl. You need to be bloody honest and up front about who you are. My girlfriend knew about me from the start.
Internet makes it even easier. Mention your CDing straight forwardly. Find who's interested from there.
Or you could just continue to hit your head against the wall looking for a bisexual. Bisexuals are much like golfballs in the rough; they're hard to find and they're rarely the one you're looking for.
Just food for thought.
