As we age, nothing works as well as it did when we were in our 20s and 30s.
Don't take it personally. It is not a reflection on you.
Lots of couples have the same sort of problem, both male and female.
But it doesn't stop them enjoying themselves and each other, for many years. Part of the pleasure is to know that you are giving pleasure. That is part of a loving relationship.
But that is no reason to stop something that we enjoy.
Hopefully, you will both come to enjoy it.
Lovemaking is a wonderful time together, pleasuring each other.
Maybe after all this time he is out of practice.
You can help him by encouraging him before the main event.
Men are visual so show him pretty underwear, and then gradually show him more, and touch each other. Above all, don't rush!
Take time to tantalise each other, but don't expect total success every time. Just be happy with small pleasures from time to time.
Relate advise slow sensual massage, so that will include visual display, as well as touching
Anticipation increases the pleasure of arrival. Enjoy your feelings for each other
9 pm on a Friday night in the bedroom is not the only time and place. Do "naughty" things in different rooms, at different times. Sometimes when one of you least expects it!
Forget the old Victorian "ladies don't move"
The more that you both put into lovemaking, the more likely you are to enjoy it, and want more.
Hopefully, you both have the potential for years of pleasure in each other's close company.
An old lady in her 80s was asked "When does sex stop?" her answer was "I'll tell you when it happens"
After 58 years of marriage, the answer is not yet!
Hope that all will go well for you both.