Extraterrestrial life

Today many people believe that extraterrestrial life exists or that there is something more in the universe apart from us. They are becoming more films of science fiction in which attempt to represent it in the beyond.
In my opinion the extraterrestrial life or life itself, it may exist but as if it were in another dimension in which watch over us and know everything that we do, trying to communicate with us, without realizing it has. You could also the possibility of that there is life and that we are alone in the universe have, and if you create another living being in millions of years. But finally, if there is no evidence of that never will it be evident, if not called you crazy.