Home is partly knowing where things are without needing to look.

A large part of feeling at home is the absence of small friction. You reach without looking, move through the dark without thinking, know which floorboard makes a noise. That accumulated familiarity lowers the effort of existing there, and its absence is why a new place is tiring long before you can say why.

If you have recently moved, be patient with the fatigue. It is not unhappiness, it is unfamiliarity. It resolves through time and repetition rather than through effort.