I take some issue with the statement about loss of abilities or sex drive not being physiological as I saw no T for over 2.5 years and the doctor said over time the receptors can be affected.

I agree. Absolutely you must deal and resolve this in your life one way or the other before any wedding plans are made. If you truly love your girlfriend you will bring this up and discuss all the aspects discussed in this discussion. Selfless love demands this of you. Your girlfriend needs to evaluate and decide for herself if she can live the lifestyle castration produces, as it is not marriage and sex as usual. Best wishes in your discernment and decision.

For me, at least, I've come to understand that the desire is a fantasy. Naturally submissive, the thought of losing my desire for sex yet still having to pleasure the other person is an incredible turnon. If I ever do meet another guy who was into it, the most I'd likely do is chastity or chemical methods. The best advice I can offer to you is to do serious soul searching before you go through with anything permanent. Dreams I have had have helped guide my way - where I lost things permanently and felt immeasurable grief. Definitely open up to her before you get married, though I cannot advise you how to broach the subject with her. Married couples need to be open and honest with one another to have a successful and happy marriage.