Oh, i see. Did not realize "best friend" was male friend possibly getting divorce.

She needs to find new best friend, new interests. And to re-interest herself in her own family. What are goals and interests as a family, and for each person in the family?

Its harder to implement now because of pandemic, but perhaps you can both search internet etc for education or groups of interest. Or take quizzes to figure out what interests you, individually, separately.