The friend who laughs at the same small thing can make an ordinary errand feel shared.

Companionship gets built out of very little: the same joke about the same sign, a look exchanged in a queue, a private word for something nobody else finds funny. The accumulation of these turns a person from company into a companion. Nothing significant was ever discussed, and yet the ordinary hour was not spent alone.

Take someone along for something dull this week, the tip run, the pharmacy, the wait for a bus. Do not plan the conversation, and let the small shared amusement be the entire content of it.