First...breathe! Calm down and stop trying to mind read why he wants to meet up with you. It could be any number of things, i.e., the holidays, etc. I would certainly ask for more clarification on what he wants to discuss that that you are better prepared and not walking into an ambush of divorce talk.
Let me just say this, none of us are/were ever ready to discuss divorce...but in many cases it happened. However, the more prepared you are for that dreaded conversation, the better. So, I would go to the meeting and if he brings up divorce, I would phrase my comments very carefully and say "H, I am sorry that you feel that way. However, I will need some time to think about this and I'll get back to you when I've had time to digest everything that you have brought up today." I wouldn't get into any kind of argument or heated discussion w/him about reconciling, etc. If the conversation starts to go south, look at your watch and tell him you've got to go that you have something that you need to do.
Breathe!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
