i think due too the amount of star's their is nearly guranteed too be intelligent life out their, i think mayby some have visited us mayby for science? mayby just for a rest on a long jorney? i dont think i could know unless i had access 2 all the Area 51 files.
i dont think we will meet any aliens in my life time tho 100 odd years is microscopic on the time scale of the universe, theirs no rush too meet them :), i think within about 2500 years we will have made first contact