I have yet to see a single statement from the BCCI over the last 10 years that they would be willing to send an Indian team to visit Pakistan. The opposition would destroy the government that dared to do this. I've heard these comments from Pakistani administrators that they believed they had a deal that India would somehow visit Pakistan but not one statement, indication, or even nod from a BCCI or Indian government official. If Pakistani administrators somehow believed that India would visit and are insulted they didn't, I'm afraid it defies common sense. I myself was hoping the Indian government would somehow thaw but lost hope when I didn't see a single indication.
Pakistan, in fact, did an excellent job negotiating the quid pro quo taking advantage of it's value to international cricket. What it wants more than that and what it hopes to achieve from this boycott, I can't say.