If you feel your current BF is someone who would get violent to you or others over what you want, why be with him at all? That would make him someone not worth being with in any type of relationship style.
He doesn't have to want what you want because this isn't a conflict with a right VS wrong.
Seeing as he might not want what you want and that might be the end of this relationship there is nothing to be gained in trying to get a person with violent tendencies to see your side of things. You could agree to being monogamous to avoid violence in the now but you'd still be with someone who would be violent to get their way when what you want conflicts with what they want.