"No, I apologize," Obi-Wan says with a slight shake of his head. "I shouldn't make this joyous occasion into something anything other than what it ought to be. This is a second chance for you and for Anakin. A life that he believes, at least, would not have been possible on Coruscant."

Obi-Wan doesn't know what he believes. Had he tried harder to get Anakin to talk to him instead of doing what he thought was right in respecting his emotional boundaries, perhaps the outcome could have been different. If he had been more honest, maybe, or advocated harder for his Padawan. There are so many things he knows he can regret, but he tries not to. It isn't the Jedi way and he believes, with utter conviction, Anakin's life will be different here.