Lost, this is a tough one - and you know I'm new here, too. But I have learned a few things I'm happy to share - maybe something will help.
Find your center. Approach your H from a place of calmness and strength. It would be so hard for me not to cry...I probably would, but I would still focus on saying the right things. There is nothing wrong with saying, "Please be safe. We will miss you. Can you let us know when you arrive safely?"
"Us" might take some of the attention off you, coming from more of a family viewpoint. You need to act As-if: You've got this. You're a strong woman and can handle what comes your way. You are friendly towards him, but not desperately clingy. You will be just fine with or without him.
You can do this, Lost. Be calm, strong, and centered. If a tear falls, it falls. Goodbyes are hard when it's going to be awhile. Take strength in the fact that most affairs burn out in less than a year...sooner if they spend lots of time together. Distance can lengthen the affair. You have no control over any of this, so turn it over to God and take care of YOU!
I'll check in on you this weekend. I truly empathize with you. I have faith you will be able to do what you need to.
