Thanks for writing this.
I liked how you described these feelings about coming back.
> It's strange how much a shared perspective on life seems to matter regards to enjoying your relationships with others.
That's my permanent state as being an xpat.
I don't like to travel in the sence what is usually meant by it. For me it is also just exhausting and similar to what the OP said. But I like to live somewhere else. You learn to see the world and people differently. Though you have to learn how to not feel lonely because of the fact that you are different and have special feelings and thoughts. You need to learn filtering people in order to find those with whom you have something in common. So the problem is not that you cannot approach new people, but that most of them are just of no interest for you.