Sometimes you have to leave home for a while to see what it was actually giving you.

Leaving is the only reliable way to see the shape of where you came from. From inside it, the food, the noise level, the way people say goodbye, all of it is simply how things are rather than one specific version of how they could be. Distance turns your background into something you can look at directly.

Go somewhere for long enough to get slightly homesick. A camp, a trip, a summer job in another town. Pay attention to what you find yourself missing, because that list is what home was giving you.