Ok deep thinking here goes.
Statiscally, we can't be alone. But if there are other alien races, they will be solidly human like us. Based solely on my faith where it says God created Man in His own image. Now understandably, if there are vaguely humanoid races out there, they too would have a holy book with a similiar phrase. They would probably have the same ideas of creation stories and major cataclysms, and probably evolved technologically the same way we did.
Will we meet them? Not till the afterlife. Do I still believe they exist? Heck yeah.