Fake it 'til you make it or camouflage it. If you're unconfident or insecure about something whether it's your style, weight, or even a deformity just "play confident" and don't speak openly about the things you don't like about yourself because guess what? No one will ever know you have an issue with those things.
I have all kinds of issues and plenty of things I am insecure about when it relates to my physical appearance. But you will rarely catch me speaking negatively about myself to others.
More importantly, as a Big Man I have a duty to uphold and at all times present myself with confidence and dignity because you never know who is looking up to you. And if you think self-defeating thoughts, it will start to show on the outside. And just like the saying goes "your outward is a reflection of your inward".
So hold your head up high and camouflage your negative with the positive.