Hi Razzle!
I've been divorced for 10 years and BOY! do I know what you're saying!! But, I also felt the same way when I was thin so its really just the new relationship jitters!! The good news is -- when and IF things should get intimate.... you'll both be so dazzled with each other, its unlikely you'll be "picking apart" how the bodies look naked.
Enjoy the dates!!! Don't let anxiety get in the way of what could be a wonderful time!!
Ellie