R.,
You do not have to be a sexual person in order to enjoy sex.
Sex is more than the act itself, it is an intimate moment in time for a husband and wife to connect in a way that they do not in a normal day.
It is not helpful that you have a Doctor who is so unwilling to be try and help.
Women in the 60's and 70's still enjoy sex.
You love your husband, try to go with those feelings when your husband wants to make love to you.
Sexual intercourse is more than just the act, put on some soft music, take a warm bath or shower and explore each others bodies as you have never done before and I will bet you will find a sex drive you never knew you had.
My husband has been very ill for 10 years now, and I miss that closeness we used to have. But it is impossible for him to act, so we do nothing.
We are both in our 60's. My husband thinks I am beautiful and sexy also, but cries from frustration and defeat.
Take care dear, somewhere in you in a sex drive. Just try to find it.
Good luck