With a galaxy larger than you can imagine, and that just being one of billions of galaxies in our universe, chances are good in my opinion that there is life out there, we just havn't found them. We are finding more extrasolar planets all the time and some of those are in the goldilocks zone (distance from sun in which is it niether too hot nor to cold). While what extrasolar planets we have found so far have mostly been gas giants, they could have moons that could possibly sustain life. Eventualy I think we will find life out in the vast expanses of our universe, it just might take awhile.