I think the most important question may be, does any other intelligent life form exist at the same time as us?
If you think about the Universe and how long it has supposedly existed, and just how short of a time period humans have existed within that, is it likely that another advanced race even exists during that tiny window of time we do? What is the likely hood that two advanced races capable of space travel meet one another in that tiny time frame? Pretty low I would say.
Has or does intelligent life exist elsewhere in the known Universe, probably. Are we ever likely to run into them? No.