Facts
- Life happened, a lot, on at least one planet we know of
- There are billions of galaxies
- Each galaxy has billions of stars
- Each star has a few planet
- Some planets are like ours
- Life like us is quite possible
- Life doesn't have to be like us, so life is even more possible
- Vast distances make travel to planets with other life difficult

So, yes, but we may never know for sure