Three words of advice..."tell your wife".
No offence, but your skirting with affairs and from your wife's perspective you've probably already engaged in emotional ones.
Nothing good will come of hiding this.
P.S. Not all guys struggle with monogamy, but very few people are actually lifelong monogamists in my opinion.
Playing the Game of Life with Monopoly rules.
Monogamy might just be in my genes
Poly Events All Over