Yes I believe that there is life I others planet; also, I believe that there is life from other planets here in earth. Example: Angels, demons and the possibility is that we are visitors in this planet and we come from another galaxy or planet; it could be a reality.
Well, I think we see them everyday; We are them! We are space travelers and we are making out space trips throughout are governments (NASA) outside this plate earth. That make us aliens to another planets and galaxies. Consequently, that makes us aliens, so, we interact with aliens everyday.
Nowadays, there are few planets and moons where there would be the basic conditions to life development. Most of the discovered planets are big and very hot and too near to its stars. However, when they improve the way they look for planets they will be able to detect small planets too. Even so I think it would be very hard to find inteligent life.