Leaving is always hard! I have not been in that situation when it comes to this circumstance, but I was married to a man in the military and always saying goodbye was part of it. It was hardest when I was the one who had to drive away! Just try not to harp on not wanting to leave, or thinking about having to. In my opinion, it just ruined the time I DID have left because I was always so sad about it having to come to and end. Then I'd just regret not living in the moment instead of debbie downing myself about leaving.