But is he a risk taker? Like in sports or other areas of his life? A married woman is more "risky" than a single one. Also, a married woman is someone that can't commit to him. He doesn't seem to want someone "available." For some reason he seems to be craving this excitement.
I can understand you both limiting conversation with each other. Although it would be hard for me not to "befriend" (not as an actual friend!) him trying to figure out what was going through his head. It's just kind of interesting to me. Although I can understand it being painful to you and wanting to avoid knowing anything about his thoughts or life. I know with my H I was very curious too, but sometimes bits of information dug in like a knife.
There is no arriving, ever. It is all a continual becoming.