I travel a lot for work and typically only see my wife on Saturday Night and Sunday. We've made it work by setting that time aside for just us as often as possible. We go out to dinner, rent a movie, go to the beach, ect... I like it because we both have time to ourselves for chores and errands and can spend all day Sunday together.
HB_99 has also has great advice, flowers or a card for no reason go a long long way with most women.
As for living together in general, it can be awfully hard putting up with each others little idiosyncrasies, just try not to get annoyed by the small stuff that doesn't really matter (like who moved the dish soap ect...) and focus on the things you enjoy about being together.