Most of the best advice has been said. I do not know you nor since I am new here relatively speaking. I would like to throw my 10 cents in to your maybe 20 bucks total that has already been given to you. I know how you feel man, life seems to love to screw with your mind, best thing I would do is retreat and communicate and find the root to the emotions you are feeling. I know from my own struggles with various emotions, often times they are rooted in almost irrelevant past regrets, boredom or even resentments based on lack of thrill. I think it is good advice to seek out other opinions because people look in can see more than people looking out. I say follow getting advice to better communication with your wife, that way you can be sure of what you are really feeling whatever that might be. There is always a right way to do things and always a wrong way to do things, however life often times makes that hard a confusing. It is good you are seeking advice, it shows you care for yourself and most importantly your wife. BTW it is a silver dime which is why this is long.
I would be a televangelist....but I have too much of a soul.