Hi Lisa,
I don't feel jealous either, despite the fact that my SO's legs are skinner than mine! :D I have always liked my body, even as it ages.
I remember having a discussion with a GG several years ago who, like you, felt a bit insecure because her SO kept himself in better shape than she did. And so I asked her, would she also feel insecure if she was standing next to another GG who was in great shape and they were both looking in the mirror? This GG said yes. And so she realized that her feelings of unease didn't stem from being jealous of her SO. Instead it was more about wishing she (the GG) was slimmer.
So here's what you need to remember: you are beautiful, and you have a beautiful body with natural curves that your CD friend might well be envious of, because as a male his body is more angular. But, if there is anything about your body that you do not like, you can change this, and you can buy nice lingerie if you want to as well (it doesn't have to be super expensive)!
