Lol... chill, man. We could have been visited or not. Truth is, we might never know. Michael Crichton's non-fiction 'The Andromeda Strain' was quite insightful on that... and his fiction 'Sphere', too.

Personally, I don't bother myself with the question. When our tech is advanced enough to answer it, it will. Right now, it only leads to pointless debates and conspiracy theories.

Just my thoughts, though.