if she's producing the idea of celibacy after having sex with you, she had the time to think it was a good idea after being away from you....basically, she had the opportunity to compare the difference.
If you pressure her, you'll destroy your relationship....end of story.
If you agree to do it, then you need to make it clear that it's IMPOSSIBLE for you to avoid wanting sex with her, and that your passion for her makes you feel like choosing her over others, and that to constantly resist the urges literally is a task of some difficulty. If she feels bad about sex after, then it will never be a way of building your relationship.
At the same time, it isn't really fair for her to want to go back on what the standard of your relationship has become.....what you've come to know as something to expect, she wants to take away.......i think it'd be best to explain to her that this change, no matter what approach she takes, will be really difficult for you to handle because unlike her, after you have sex with her you probably feel GREAT, and feel closer to her......taking the sex away for you makes a divide between you.....if she takes something away and expects you to change for nothing, that's unreasonable....
Could just going out on more dates work as a substitute, or have her understand that you need some sexual outlet so you'll look at porn?????