Let's go through some numbers so it will be easier to grasp and answer the question. We are orbiting our parent star with 7 more planets which are (with exception of Mars) highly inhospitable (let's also exclude few moons of Saturn and Jupiter). But let's go out of our solar system.

There are aprrox 200 billion stars in our galaxy alone. Some estimates say there are at least 2 planets oribiting each star. What we are looking for are the planets which are orbiting stars in their goldilocks zone (where water can be in liquid form and organic chemistry can take place).

Let's go forward and say that there are billions of other galaxies which consists of billions of stars. We probably aren't alone, we are just so far away.