Are there Aliens Out There?

I do not believe that the galaxy Milky Way holds aliens, I know the Milky Way is very big but that doesn't mean just because its big that ther are aliens on it. The facts are there over four decades astonomers have been trying to communicate with aliens but they don't really have anything to show for it. Even if you wanted to say there were aliens out there it would be nearly impossible to find them, astronmers say they could be within distance of aliens but are nearest star would require 200,000 years of travel. Also astronomers and scientists have found no evidence of life and Earth remains the only planet of life. Another fact fact is that the conditions aren't suitable they are very rough and hostile and with no oxygen you can't survive. No one has ever been able to detect an alien or a spaceship or anything that deals with an alien and even most scientists believe they nwill never be found not that they don't believe in aliens its just the thought as why they would want to communicate back, but still it should prove there is no aliens they have never been able to detect a alien and with our technology being so advanced and still nothing it should give you sign that there is no life out there.