Mine did that for the longest time, about 3 years. Over Christmas he came over and really acted like he wanted to come in. I invited him in and he looked around the house a lot. He stayed for about an hour, talked and left suddenly. It was so weird and unexpected. Continue to be consistent in how you treat him.
Me: 46 H:44 Together: 25 years Married: 20 years Separated: 11-30-06 Divorced 12-21-07 OW: EA began 2005 PA began end of 2006 3 children,20, 16, 6 ex asked for forgiveness 01/16/11