in my opinion if the tendencies are there and the urge is present then go with it be a humanist for once in your damn life go with your instinct, truthfully i think youll like it, just also remember who is going to better know how to pleasure a female other than a female same with men i have a b/f and a g/f so hell i should know or at least i shoukld be at the advantage in this perspective, hell maybe not its still early.....

Go for it girl...in my opinion your definately bi,if you like her get with her and if you still want to mess with guys have her let you be an open relationship where you can get with guys too if you want but still be with her. I'm bi but I'm engaged to one hott guy, he's kewl with me being with girls and I even share with him.lol So it's all good!

Just do what you feel like. I can't stand it when people act like they're in middle school and won't tell someone they like them. If you're too uncomfortable with telling her, find someone else for a time, I guess

Wish I could offer you some great advice that would answer all your proplems, but alas I can't.
I myself don't know if I am bi or not, I have never been with a girl but once upon a time I have something of a crush on my best friend. I never spoke of it to anyone.