At your age it's very normal to be a bit confused. If you were gay then you'd know it already, and since you are attracted to males, I'd say you aren't gay. Now, are you bi? Well, only you can know that, I can't tell you. You say you are attracted to girls, are you sure it's sexual attraction? When I see a pretty girl I always look twice, but I assure you, I'm not even remotely Bi-sexual (not that it's a bad thing).
As for testing the waters, I don't recommend that. First of all, you're too young (yes I know that 16 year olds know everything, but really sweetie, you're too young), secondly, if you decide to experiment, you may end up hurting someone else, or yourself for that matter.
Give it some time, you'll figure it all out.
Good luck. :)
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