I know my family would support me, they'd be surprised at first but they'd come around. My dad can be a little biphobic sometimes though, and I doubt he'd take me seriously at all if I came out at the age I am now. If I was lesbian I have no doubt he'd accept it, but I don't think he really believes in bisexuality. I don't know what my mum thinks, although I don't think she's homophobic or biphobic. They aren't what I'm worried about though, it's more people my own age I'd be afraid to come out to.
I was thinking about it the other day, and (offline) I know quite a few 'out' gay/bi boys of my own age, but no girls. Why do you guys think that is? Are girls more insecure, or is there more of a stigma, or something?