What are your thoughts on this? (Spoiler)

The "American" guy Caleb - is actually Itallian. He is never going to Tibet. And somehow Jane knows this at the end, and that's why she goes of on her own? I dont know but that thought struck me when they talking for the last time at the bed.. Caleb seemed so distant somehow. I mean why would he live at some random distant relative? I think he was lying all the time.