What's your point of view about extraterrestrial life ?

Currently I'm studying the Fermi paradox and I'm wondering about it. I'm interested in your opinion on this simple question:

What's your opinion about alien life ? 

They exist and I'm sure they already came in here !
11% (2 votes)
They may exist but I don't think they were there before
33% (6 votes)
They surely exist, but they never came here and never will
28% (5 votes)
I'm not sur, maybe or maybe not !
17% (3 votes)
I don't think they exist in this galaxy
0% (0 votes)
I'm sure we are alone in the universe
11% (2 votes)
Total votes: 18