I can't offer anything resembling advice that actually comes from a place of experience, but I'm the sort of person who thinks its better to confront these things head-on. What's the alternative to not facing it right now? If the answer is anything other than "I will be completely satisfied with myself as a person if I never confront this side of myself again" then the only thing you're achieving by not confronting it right now is either delaying the inevitable and thus wasting more time, or growing old with major regrets.
Let's say you confront the issue now. What's the worst case scenario. Your marriage falls apart, now. You then have the rest of your life to pick up the pieces.
Let's say you confront the issue ten years from now. The worst case scenario involves your marriage falling apart, except now you have ten years fewer to pick up the pieces.
That's the worst case scenario, mind you. I'm just using it to illustrate that there are no real pros to putting it off. Unless, of course, you're comfortable never confronting your sexuality. Or, you do confront it, but never tell your wife, which I think is despicable and not a real option.