Wednesday Book Quiz

In 'Michael, Is It True', Jessie asked Michael why they were together, during an agreement they were having over her best friend Dana. Michael stating that Dana was putting things in Jessie's head. And trying to encourage Jessie to leave him. In the agreement, Michael told Jessie that he could give her anything in the world, but not a -"BLANK"-. What is it that Michael claims he can not give Jessie?