Where Are They

Where are they?
It has been a century though but still we haven’t found any form of life outside earth. We boast about our advancements in science and technology in past few decades , yet unable to locate any alien life.
Do they really exist? Is a big question in the brains of every human on earth.   In 1950’s Enricho Fermi suggested that if technologically advanced civilizations are common in the universe then , they should be detectable in one way or the other. The Fermi’s paradox can be stated as follows:
The size and age of the universe incline us to believe that many technologically advanced civilizations must exist. However, this belief seems logically inconsistent with our lack of observational evidence to support it. Either the initial assumption is incorrect and technologically advanced intelligent life is much rarer than we believe, or our current observations are incomplete and we simply have not detected them yet, or our search methodologies are flawed and we are not searching for the correct indicators.
In his book published in the year 2000 , Peter ward, a professor of biology of earth and space sciences claimed the idea of rare earth hypothesis which says that the emergence of complex life form or the multicellular form on earth required an extremely unlikely combination of astrophysical and geological events and circumstances.  
Do this mean that are the chosen one and there is a very little probability that a comlex life form exists ? Is our fantasies about aliens will remain as such. This can be found out only in future since we are not currently advanced to that extent.