There's probably alien life out there somewhere, but at the moment there really isn't any compelling evidence that it's come here to our planet. The vast majority of life in this universe is probably incapable of space travel or interstellar communication, and those few kinds that are are probably too far away to have met us by now.

I'm not the kind of guy who's just going to believe in an idea like "the aliens have landed and the government is keeping it secret" just because it sounds cool. I have to be convinced with solid evidence. I just haven't seen any, and I'm guessing you don't have it either.