If you're having sex with each other, and have any plans to continue a relationship, you wouldn't care.
I've been having sex with the same girl for 4 years and we've heard and seen all sorts of things on each others bodies. If you love them, and they love you, neither of you will care whether the other looks 'fit' or not. Sounds like your bf knows this already, and I doubt he thinks any less of you because of it. Don't feel bad because you still feel insecure about yourself, a very large number of people do. Talk to your bf about it, discuss it with him, and trust in what he says. You'll stop worrying about things like that and enjoy yourself more if you're not constantly thinking about what you look like. You're sticking parts of your bodies inside each other for goodness sake. There's not much more you can do after that :P