Initial automation response... Screw im' O_o who needs people like that around?
But the Manual response (after thinking it over) If your friendship is really THAT important that you would rather live a lie, then by all means do it, I don't tell my friends I'm Bi, but honestly, it would prolly be better to just let them know then let them know you're not like the stereotype, or if you have to, rattle them a bit, they seem old enough to take some harsh language, let them know what you ******* think, that usually gets someone to stop and realize they're making an arse out of themselves
just my 2 cents