Age and other stuff

So, firstly how old is everyone here? I'm 14. Anyways, who here is annoyed by the whole "You're too young to decide!" Or "Yeah we'll all girls are bisexual in highschool. You'll be straight by senior year." Or "it's just a phase."  I'm a lesbian and my friend keeps saying that every girl in high school is bi and that I'll be straight by the time I graduate but does anyone else hear things like this? Is anyone else kind of bugged or offended by this?