does he have a right to be mad?

So I always suffered from body issues. I was weighing 280lbs when I first met my husband and now 2 years later I weigh 148lbs and I'm 5'8" I know I'm tall lol. Well it's a fear of mine to gain any weight at all. Now I want to try to go back on a diet it's a soup diet and my husband is a little upset, because he doesn't think I need to loose any more weight. What do I do