We have the power to contact our besties with the tap of a finger, yet we live in a loneliness epidemic. Journalist and author Anna Goldfarb wants to know: why? And what can we do about it? In today’s installment of our friendship advice segment “Asking for a Friend,” Anna delves into the research behind her book “Modern Friendship.” Anna’s findings reveal the importance of infusing your friendships with a shared sense of purpose, the optimal number of friends, and just how many hours it takes to form what she calls a “wholehearted friendship.”