Wouldn't the maths suggest that its clearly probable that the universe is massed with life, and wouldn't maths also suggest that the likelihood of us being the only planet with intelligent life to be almost impossible?
This is what I think anyway from the documentaries I've watched and listened to many scientist talk about this subject.
I am a true believer that there's life out there, some planets maybe just fish, others maybe just bacteria, other planets with maybe more complex life like animals running around and maybe even people.
If anything, surely its harder to believe that there isn't life out there rather then that there is, if you get my meaning.
We're a type zero planet so hopefully we dont come across any type 3's or else we'll get owned.