Originally Posted by bookbug
Did I misunderstand? Are you not asking him to refrain from pursuing others sexually? Isn't that asking him to change who he is?
And btw, don't mistake questions as criticizing you for what you want. I have no opinion about what is appropriate for anyone else. (When I am in poly relationships, they have tended to be polyfi, and many people find that odd!) But it appears that it will be impossible to have what you want with him.