I think it is important for your R to achieve some level of mutual acceptance. There is no hope of getting close as a couple without it. Can she accept that you are a sexual person? That you will never be happy with the marriage without a sex life? That the result of "agreeing to disagree" is that she will always get her way in this issue and that you will rarely get your way? I hope that your willingness to accept her lack of sexual desire acts as a window that allows her to see your situation with more compassion.
SM
"If we will be quiet and ready enough, we shall find compensation in every disappointment." Henry David Thoreau