I do think that there is intelligent life out there, and yes, they are as unaware of us as we are of them. Because of the vastness of space, and the amount of time it takes for light to cross it. Perhaps they have yet to invent telescopes powerful enough to see our pale blue dot, or they are far enough away that if they can see the earth, they are far enough away that they are seeing it as it was thousands or more years ago, either before humans or before we would be showing signs of our existence. Though I don't believe that we have been visited by any of them.