"[...] somewhere between “Let’s catch up soon” and “Sorry, life has been hectic”, adult friendship became one of the most emotionally significant and least discussed losses of modern life. [...] Friendship, however, has always depended on a certain irrational generosity. A willingness to waste time together magnificently. To listen to the same anxiety for the fifth time. To sit through silence. To remain available without agenda."
https://timesofindia.indiatimes.com/blogs/civil-irony/the-quiet-grief-of-adult-friendship

