You sound really stressed! Since the reunion is a must-do, I would let the 3k go --- give yourself permission, darn it, to do what you want and to NOT do what you DON'T want! It doesn't mean you are lazy or bad, simply that your life is full of events and you can only do so many. Shrug, toss the 3k for the moment and try to calmly plan the reunion. (Consider yourself coached to the point of saying "no", ok?)
Maybe you and your guy can plan your own 3k at a time and place that is more convenient for you both --- someplace with good parking and in good weather, maybe some lovely, quiet area with good trails. You can time yourselves and push as hard as you want, treat it like an actual race.
Good luck with whatever you choose!