Its funny how people adapt. My wife and I lived in each others' hip pocket for years, then when I began the airline life, we both adapted and sort of got numb to it - making lemonade, I guess. The quality of any given day together was greater than before. Every time I got home, it felt like a vacation to be capitalized upon. We'd go out more and have more fun.
When I left the airline and came back home, there was a month or so of strangeness, but again, we've adapted back to regular life being home every day now. If/when I go back to airline life, it'll probably be a tough transition all over again until we are numb to it again.
If you care for each other enough, it'll work either way.
FYI, I commuted 900 miles each way to work as well.