Lord, have mercy!
Dear brother, my heart goes out for you. In a way, I am like you because my wife calls herself an agnostic and is very sceptical over "this whole Orthodoxy thing," so I feel very lonely as far as my faith goes. All our friends, absolutely all people with whom we socialize in real life, are not Orthodox and non-believers, agnostics or atheists. However, my situation is perhaps much easier than yours because my wife does not object against me being Orthodox and attends the Divine Liturgies at our mission parish with me.
My only advice is, like others have already said, love your wife, be the best husband in the whole world for her, and be very, very patient. You and your family is in my unworthy prayers.