Well, that text or phone call tells you absolutely nothing about what he thinks is so personal that he needs to talk to you in person about.
Since he's stated that there is no big news, surprises or changes, I would go into this meeting w/little or no expectations and don't be surprised if he says he wants to be friends.
I know this difficult, but I would look on this meeting as a meet up w/someone you use to live next door to and you just happen to run into him/her and sat down for a cup of coffee. Always remember, you have the power and control to end the conversation when you feel it's getting a bit too much for you.
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.
