There is hot water circulating under the ice on one of Saturn's moons.
http://www.wired.co.uk/news/archive/2015-03/12/enceladus-hot-water
I think we are going to discover simple (unicellular) life-forms and especially self-replicating particles such as viruses and prions, which we generally don't consider alive, are fairly common in the universe, perhaps occurring on several extra-terrestrial bodies in our own solar system in the current centry; but complex, and especially intelligent (as we define it), life is probably extremely rare, and I doubt we will make physical contact with sentient aliens in this millennium, if ever. (Always assuming we
survive this millennium, although I expect humanity to last a
long time, as we have just the right combination of ingenuity and adaptability to move around the galaxy leeching planets dry. And I don't see us running out of planet-hosts to parasitise any time soon. I like reading those stories about alien races meeting humans, presuming us weak, and then being destroyed by humans motivated by pure spite to fight to the brink of extinction -- experiments have already shown that humans will usually choose spite over profit in situations such as dividing $100 between two parties, where person A decides the split and person B rejects (in which case no-one gets any money) or accepts it (in which case they each get the agreeed amount): the rational thing to do is
always accept because you never stand to gain from rejecting, but persons B almost always reject when they feel the division is unfair, choosing spite over self-interest.)