Aging is part and parcel of humanity. We get old with time. Our social circle becomes limited. We get more immersed in ourself. I have seen my grandparents, with age they got hooked to some purpose and a routine.
My grandmother would wake up and spend a few hours in prayers and later in the day with reading. She would have her friends visit sometimes to play cards.
Our youth defines how we live as we age. Having a set of habits, a company of friends and a deep purpose will help us in aging well.
Seneca puts it well.
Let us go to our sleep with joy and gladness; let us say: I have lived; the course which Fortune set for me is finished. And if God is pleased to add another day, we should welcome it with glad hearts. That man is happiest, and is secure in his own possession of himself, who can await the morrow without apprehension. When a man has said: ‘I have lived!’, every morning he arises he receives a bonus.