Before you meet him, make sure you know what you want because it's kinda obvious that he wants to reconcile (if he can't stand it when he thinks you may be moving on) so know what you want too. Don't give him any mixed signals it's either you're in or you're not so make it all clear and straight forward and have a great night of communication about wants and needs.
Best of luck.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion