Am I the Problem? Committed or not?

Am I the Problem? My fiance' and I made a New Year's Resolution to be healthier in 2025 so we can look our best for the wedding. I have been taking it serious and it has been really hard. I would love have French fries instead of steamed veggies but I am sticking to this. She is not. We go out to eat and she is ordering desserts, appetizers and very unhealthy choices. I told her I need her to support and that we are in this together. She said I am policing her body. Am I the problem for just wanting us to be the best versions of ourselves?See omnystudio.com/listener for privacy information.