I don’t see another man, but I do see that he doesn’t want to settle down quite yet. He just got it in his head that he would be happier elsewhere. This is a weak habit that some people have. My psychic sense is there were signals there, but you likely missed them. Even if he does come back, I would be cautious about opening the door for him.
What is this about you and public speaking? Do you enjoy and have a talent for being in front of people. I keep seeing this around you.