I refuse to believe that we're the only planet with inhabitance within in this Universe. So yes, I do believe in aliens. Perhaps not the flying saucer variety but who knows? Just because you can't see it for yourself does not mean that there is nothing there.
For example when you look at a black part of the sky at night withholds a multitude of stars, galaxies and so on. The problem is light pollution... given off of us AND existing planets and the moon. Go figure... But you can't tell me there is no chance of some other planet somewhere of having a form of life on it. Maybe a more advanced life-form... or a simpler one.

In 2001 Scientists claimed they'd actually found life in Outer Space. They found 'clumps of extraterrestrial bacteria in the Earth's upper atmosphere.' It may not seem like much but it's something is it not? Bacteria exists here - and boy do we know it haha.

Another thing was in like 2008. A photograph was taken which may have been evidence that there was once life on Mars. But that's just looking close to home! What about further out there?

Despite some of it being a load of hype, I do believe that maybe some of the sightings that people have seen are real. Maybe it's just a grand hoax passed down the generations... or maybe something real sparked it off.

The fact of the matter is, we only live on a tiny spec of this Universe. We don't anything yet... And I believe we're not the only ones out there ^~.