The best way is probably just to tell the people you care about in as straightforward and matter-of-fact way as possible. Tell them you love them, and you hope they love you too, and you hope that they can understand and be supportive, but that if they can't, you will still be unable to continue living a lie, and will henceforth live your life openly. Once you've made your declaration, whether or not they're able to accept you as you are will be up to them. You have the right to live your life in an authentic way, regardless of their feelings. Good luck.