When circumstances in relationships are good, it is so easy to do everything you can to make sure nothing ever changes. You can't. When things are bad, it is so easy to think they will never change. They will. Both you and any person you are relating to change; year to year, month to month, day to day, moment to moment. Plus your surroundings change, the economy changes, the weather changes, the calendar and the clock change, the stars change, everything is changing all the time.