It's difficult to know if there are any form of life out there at all. But the probability for lifeforms are big. We must also look at the definition for "life". Possibility for intelligent life may vary, but for one celled organisms and similar forms could there be a LOT of.

But since the radiotelescopes haven't recieved any form for intelligent "messages" from space the time they have been monitoring it (about 50 years), we can with certainity say that there are no beings out there who master the art of radiowaves for at least 50 lightyears away.

Our own radiowaves have reached out that far (50 lightyears), so if there are intelligent lifeforms who has radios, they will have detected us.

I can mail you back if you want to dicuss this topic any further.