a friend asked me to post this (and she does not want to join just to post 1 question)

but: she has a friend, who is totally obsessed with greek mithology- to the point where she actually believes she lives in that time frame.

she does not want to lose her as a friend, but can not seem to get anywhere with any other conversations.... everything he starts to talk about, her friend goes back to the subject of greek mithology

she really wants to try and help her, too. but can't if she can't talk about any other subject.

what would do in this situation?

any answers i'll pass on to my friend.

thanks