As a by-the-book Christian I should tell you that we are the only thing in the universe that God has created.
As an intellectual I will say that it is arrogant to believe that we are the only living sentient beings in the vast reaches of space.
Time and space are endless so who is to say that we are the first? There could have been countless civilizations that have already died out, and three million years from now we might get a post card from them acknowledging their former existence.
Or long after we have gone the way of the dodo something out there somewhere will recieve the first television signal as Hitler announced the beginning of the olympic games.
It's a grand question, and to answer it....yes. Will we ever meet them? I doubt it, at least not in our lifetime. Einstein offered that the only way we will meet or contact intelligent life in this millenia will be through paranormal means (ESP).
Either that or they will drop by and have a beer with us, which if possible is probably closer to reality.