In "The Princess and the Pear", Booth is hardly there. The producers off Bones are holding off finally getting Booth and Bones together, because they know that as soon as they do this, the show ratings will go down. Take Lois & CLark for example. As soo as Lois and Clark were together, things slid downhill, fast. So by making sure they avoid all Booth/Bones interaction, they can hold off getting them together, and keep the show on air longer.
Sucks for us, but I don't mind as long as they don't draw it out too long.
Come on Bones and Booth !!!