You only notice the fridge humming when it stops. Some people in your life work the same way.

Steady things go silent in your mind. The person who always drives you, always answers, always has the thing you forgot becomes background, not because you do not care but because nothing about them ever demands attention. You find out how much they were doing on the first day they are not there.

That is worth getting ahead of, because it is one of the few regrets you can avoid cheaply. Think of whoever in your house is load-bearing and say something specific to them this week. Not a general thank you, but the actual thing: the rides, the lunches, the fact they never made it a favour.