Hope, I'm happy that you've had some happier experiences with him before he leaves but I'm sorry that it causes so much more pain.
Hang in there and things will work out. I'm sending tons of hugs and thoughts and prayers.
Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.