reverse psychology, my friend.

think about it, really. there are two options. your gf can play by the rules or not. don't punish her, or yell at her, or be mad at her, or argue with her if she decides not to play by the rules of "respect and consideration" in a relationship, just let her know that her CHOICES have CONSEQUENCES.

if she chooses option A (respect and consideration for you, and a sense of reverence for your relationship): she gets rewarded with your commitment and undying affection

if she chooses option B (lack of respect, consideration, and poor focus on the importance and value of having you): she does not get rewarded with your commitment and undying affection.

those ARE the choices. anything else is an illusion.

a woman CAN actually be friends with a guy without wanting sex, a man CAN NOT be friends with a woman without wanting sex from her. anybody who says anything else is wrong. even if only on a subconscious level.