Anakin felt the change in Obi-Wan's mood. He didn't like the uncomfortable silence that followed. Talking about their future always seemed to kill any conversation.
Before his mind could jump to the conclusion it was really any conversation about him that sucked the joy out of the room, he brought the topic back to Ani.
"I would just try bringing attachment up with him again. It might help ease his mind if you had an honest discussion with him about what you feel for him."