sounds like you have more issues than you think. that being said, people do fall out if love. I could never imagine that in my life though. I've been married for 31 years and my wife is hotter than ever. Sex is better than ever as well. you have to remember that women need emotional stimulation in order to be receptive to sexual advances and become aroused. Could be that she is tiered of you as well. If you are still in love but have no sexual desire for each other, I would advise you to seek couples counseling and find the problem.