I have been married over 20 years, and the single thing I have learned is that loving another person is a choice we make. it's an action, not a feeling. Feelings are fleeting, but God IS love, and we have to choose God, so we have to choose to love. God is not fleeting. Learn how to love your wife, not in spite of the faults she has in YOUR eyes. Love her because those differences are partly what makes her the amazing woman you CHOSE to love.
One way to do this is to remember the triangle. God should be at the top of the love triangle. The closer each person gets to God, the closer they get to each other naturally. Let God teach you how to love. It's the only way you will learn to love your wife in the same way that Christ loves His Church-unconditionally. God designed marriage in a way to benefit both people. Have you considered discussing this with your family doctor? Perhaps you're blaming changes in your wife's body for a lack of some vitamin or whatever that your body needs to function at prime. Or perhaps there is a deeper issue emotionally, the two of you need to discuss either with each other, or with a Christian pastor or therapist? I cannot say, because I am not part of your relationship, but I do know the answer is there, and will be found in love, not in anger or disgust.
Be blessed