PFM~
I can relate to some of how you feel.
Throughout my youth, and still to this day, I have always been the tomboy. I was never into the Barbie, pink or girly scene. Yet, I've remained quite feminine throughout. I am masculine in my own right..but that's just how I am...how I've always been. And I like it because (IMO) it's a trait that has then (and still does) carried me through situations that my "more feminine" friends had succumbed to.
My entire life of working, I've chosen the "men's" work. Its what I love to do. And the more physical, the better...it's what maintained my shape over the years and kept me from "stiffening up" (lol) in my later years. If I could now, I'd certainly choose a physical labor job...but I can't anymore...bod won't allow.. Wahhhh! But that doesn't stop me from being as physical as I can be.
I don't think there's anything wrong with feeling a bit more masculine just because you are a woman. It's who you are, maybe ? You can certainly use that to your advantage.
I was very overweight in my youth and up into my teens. Lost my weight very rapidly. Later in my years had a baby and lost that weight rapidly as well. Although I'm presently 25 pounds underweight, I have my share of excess skin that I'm not thrilled with, either. Gravity, aging, pregnancy &/or excessive weight gain then loss all plays a direct role in the alteration of the body.
I know how you feel about self-confidence (or lack of) regarding appearance though. But try not to assume that because the way you feel about yourself is how your love feels about you..Chances are that he views you in an entirely different sight?
Maybe try talking to your love....express to him your feelings about your insecurities? Chances are you may discover that he feels differenly?
I hope this has helped you....some.
Take care~
Shangrala