Research and writing on the overhead of staying in touch. Some of it is ours, with the numbers attached.
The friendships that survive adulthood have the lowest running cost. How to keep one alive on very little, without it going quiet for good.
Texting is asynchronous but socially synchronous. Sending one sentence opens something, and knowing that is why the sentence often does not get sent.
People answer a problem with a solution because that is what listening looks like from the inside. How to ask for the other thing instead.
Adult friendship is organised around arrangements, and arrangements are expensive. How to ask for somebody nearby when you do not want an occasion.