I have a friend who made up a boyfriend for me and i i know he fake what should i say to her and it gross me?

she would like make up reason why he did could not call and if he did it would sound like a girl and he would never say hi to me in school or her and supposely he alwasy hangs out with her and when she was on the computer he was alwasy on your if she was albe to get the computer she would have a screen name for him to what should i say to her and its groos me out bec she would say gross things to pretend to be him