I agree with Darkfinn, honesty is better sooner rather than later. You keeping this to yourself will start to eat you up more and more the more you keep it in, and the closer you get to saying "I do". It will be hard at first, but like BettyPooh said, guys take it a lot better than girls do. For some reason, we girls are more judgemental than guys. It sucks, but it is true. Good luck!