OP, it's a tough situation. Men can love more than one woman at the same time, and I don't think women here really understand that, because for women, they can only truly love one person the way you describe your feelings for both women. It would be extremely painful for your wife to find out how you felt about her.
Don't leap on my back for making generalisations, ladies.
All I can say here is that these feelings usually go away. It may take years, but they (usually...) go away, as hard as you would find that to believe now, so deep in thrall you are to the chemical cocktail of love.