Fat is not the same as curvy. I'm a size 10. 5'2". I have a 12" diff between my hips and waist. No rolls in between. To me that is curvy.
I have been much larger. 250 lbs. And while I still had a good 10 " difference between my hips and waist I wouldn't have said I was curvy....I was rolly.
But I have noticed a trend among plus sized women in the last few years, where they seem to just have adopted the adjective curvy to describe themselves. I'm a size 22 and curvy....uh, no, you probably aren't. There does come a size where curvy stops and you are just fat. And that is okay, to be fat and love yourself, but be honest with yourself. You will never change if you can't be honest about what you really look like.
That's my soapbox. Have fun with it:)