You got that right. I know it’s frustrating to see people you love making unhealthy choices. I’ve had to hold myself back from pushing this way of eating on my sick carb addicted family. But you can’t make those choices for her. A person’s way of eating is such a personal choice that the only way they will change it is if they want to.
You love her and want what’s best for her, that’s obvious from how much you care about her health. But she’s not asking you to be her dietician. If you keep criticizing her body and pressuring her to change the way she eats it will damage the relationship you have with her. After all you’ve said to her, just let the topic rest and don’t bring it up anymore. Wouldn’t you rather be a supportive, understanding and compassionate resource for her when she needs your help and guidance? Nutrition may be the most important aspect of your life right now, but she may have other priorities at the moment that need her attention.
You’ve explained your viewpoint to her and now the ball is in her court. The only thing you can do is try to find a way to minimize your frustration. Focusing on things in her life that she is doing right could help.