6. He wants to show how much he has matured.
He was the one who dumped her, but with time, he may have come to realize that he was just as responsible for the failings in the relationship. He wants to show her that he has matured and is ready to take responsibility for his part in it. He probably wants to give things with her another shot, so the conversation will usually focus around what he has been up to lately and the things that are going well for him. In this kind of situation, it is better to employ conversation-ending techniques to let him down easy.