I like dont get thiss haha x?

so i was out with my girl mates and they were stood a fair distance away from my ex boyfriend and some on rang me on my mobile phone and they had my mobile and one of them shout 'omg fit (the boys name) Just rang (my name) and then as i was walking over to them one of them started shout guess who Just rang you, fit (the boy) and my ex boyfriend look at me as if to say who the hell is (this boy) why did he do this ?x