KRISTEN Stewart used to get called a “bitch” when she was at school.The actress, 20, says her schoolmates were jealous of her Hollywood career.“I couldn’t relate to kids my own age. They were mean and didn’t give you any chance,” she moaned.“I was never the type of girl to be walking around talking about acting, so I didn’t get a whole lot of hassle until someone saw some old movie I did.“I tried to play it down, but I definitely got, ‘Oh,...