What smellslikesnow posted earlier, how Carly told Jason he feels deeply and sometimes causes him to shut down? I think that's the reason that Jason never mentions Jake. I think if he were to think about him all the time, it would destroy him. He and Elizabeth made an agreement, for the safety of their son, and he's abiding by that. And everything that's going on with Michael right now is probably only reinforcing his belief that he did the right thing. It doesn't mean that he doesn't love Jake, it's actually the opposite. He loves him enough to let him go. Not saying I like it, but I kind of understand the character's point of view. It's almost like he's blocked out that entire part of his life, because he knows he'll never have the happiness he had with Liz and the boys. JMO, but that is very characteristic of Jason Morgan. He did the same thing when he came back years ago and Carly was with Sonny. He's not the type to break down and wallow over what he's lost. In my head he sacrificed his own happiness for the safety and future of not only his son, but also the woman he loves, Liz.