but, yes. if we assume that life will sprout wherever the conditions are optimal, there will literally be millions of life bearing planets out there. and, assuming evolution takes place wherever life exists, than many of these planets will have intelligent civilizations.
without a doubt im my mind, we are not alone in the universe. maybe within our own solarsystem, take venus, a hot acidic world, uninhabitable to mammals, but, life is flourishing in similar conditions in our own planet. also, some of jupiters moons have active volcanoes and liquid methane flowing on the surface.
the universe is SOOOOO expansive, literally infinite. there is life out there, the question is, will we ever find it, or will it find us first.