Are British girls mean to American girls?

Im English x) and I think were the same age if your going into year 9 soon! Trust me if I saw an American I would scream and I try to talk like one but I fail :D but I would so hang around with an American anyday hahaa..! :3 to us,we dont have accents we think we speak normally but Americans to us they have accents xP Not all speak posh! I dont thats for sure! Depends were your going in England because you'll mostly find posh people south ways >.< have fun in,England if you go! x