Don't mind the girls. It's been proven that girls hate each other and their friendship is more brittle than an egg. Guys can fight and laugh it out the next day, girls can eye the same guy for one day and hate each other forever.
Girls have no friends from their own gender, and every male who talks to them wanna bone them. That explains their bitch mode and insecurity, not to mention that biologically, they need to live with their emotional shit fufilled, hence they are in a never ending vicious cycle of shit.