Help!!! I need advice about a groomzilla ☹️

My fiancé and I are getting married in July, we just got engaged a week ago. And he told me to plan whatever I wanted. Well last night I showed him the bridesmaid dress I picked and he hated it. We had a huge fight and I don't know what to do. He ended up saying that I could do whatever I wanted, but I don't like knowing the fact he hates the dress and the color. What would you guys do? All my girls love the dress. He said it looks like a nun would wear it, and won't be flattering on a heavier person. Advice please???