I do not think you need to blame yourself for a physical incompatibility with your spouse. You are as the gods made you and so is she. That your love could not surmount this in the end is no shame to either of you. It does not mean that your love was not worth having, either.
Pure physical incompatibility is documented as far back as the Kama Sutra, in an ancient era where arranged marriages were the norm. I think it was noble of you both to try to surmount the discontinuity between you with love and tolerance. But in the end, even in a relationship we must first care for ourselves, in order to care for one another.
Both of you are doing what you need to at this time in order to increase your well-being. Continue to wish for love, and best to you both in future.