Knowing the entire royal family.
Getting dressed to the nines for all the state events.
Late nights working.
Not seeing each other for days because of opposing work schedules.
Always being relieved when you both finally get a moment to be together.
Home cooked meals and black and white movies.
Being the other half of the British Government.
International trips together.
Both speaking a multitude of languages.
Being very skilled at having entire conversations with looks.
Trying to always have lunch together.
International crises' stopping you from having lunch together.
Reading together every night.
Calling each other every chance you get.
Always knowing that the other has your back and trusting them with your life.
Having little code words you use to say "I love you" when in crowded rooms or surrounded by government officials.