It is COMPLETELY possible that there are other life forms outside of our solar system, but not in our own. Think about this:
Our Galaxy, the Milky Way Galaxy, has billions and billions of stars, and each star is just like the closest star to us, The Sun. So each Star has it's own Solar System with planets revolving around it, and if there is a planet as far away from their star as ours is from our Sun, then they alsmost certainly have life on that planet. Any closer to the sun would be too hot, and any further away than our Earth would be too cold. Also, there are billions of other galaxies outside of our Milky Way Galaxy, the closest to us being Andromeda, but all galaxies move, and the are billions of stars in billions of galaxies all over our universe. It is possible that there are billions and billions of aliens outside of our galaxy and at least 10 intelligent ones inside ours.
Pretty cool, huh?
Why is it that every time I post something people stop coming to the thread and no one sees it?