With the universe being filled with trillions of trillions of stars, of which many may have planets that we cannot see through telescopes (obviously). Some must have life on them. There must be other life out there. I can't accept that we are alone in such a massive universe.

It may not be in the forms that we are familiar with, although we have an amazingly vast assortment here on Earth, so who are we to say that they don't exist out there somewhere. If the universe is billions of years old (big bang theory time), other beings may be far more advanced than we are. Just look how much humankind has advanced in the last 100-200 years! It is truly amazing.

To say we are alone in this vast universe is to have a closed mind. We are probably not alone. And if they do exist, why, pray tell, would they want to make themselves known to us? Humans are very destructive to other humans (there is always a war going on somewhere), how much worse would we be to an alien life form? If the aliens turned out to be like the aliens in the movie Independence Day, then we would really have something to worry about! So IF they are really there, and IF they are watching/observing us, then they may be no threat to our existence. Truth is, they probably think we'll destroy ourselves anyway, so they will probably amuse themselves by watching us do it.