Dating yourself makes sense the way you described it. Take care that an activity doesn’t become a mindless habit. We limit restaurant visits to one or two a week so that it is still a treat.
I am married, but both of us have solo activities, mostly at home. For us, most things that we do together, like going to the farmers market, shopping at Walmart or lunch at the Mexican restaurant, is like a date.
I am 73 and the last 10 years is my best decade yet.