Gradually, and over the last 3 years, my girlfriend who is now my fiancee has put on about 20kg of weight,and is clearly obese. (The pandemic didn't help either). I love her dearly, but the reality of this is that I'm struggling to remain physically attracted to her. More importantly, I'm also worried about her health. Weight is a very fragile topic with women and my fiancee is generally a sensitive person. As I've been brooding over this for more than a year, What's the most caring and effective way to broach this difficult topic with her?