My only advice is to keep building your relationship with God. No matter how things go in your relationship with your wife, a close relationship with God will make you a better man in general; a better husband, a better father, a better employee or employer....just a better man. Becoming the man God chose you to be will open the doors for joy in your life, whether that is with your wife or not, I can't say.
As for your marriage, I don't know you or your wife to be able to really comment. You need to discuss this with your pastor, counselor or whoever you chose to be your guide in this.
