Aliens are coming

The universe is huge so it is impossible; at least I think so, being alone, without any other kind of life in the whole outer space.
In my opinion aliens are not here yet, but they will, or probably we will land in their planet first. And this is a curious belief, because in films we always see aliens invading the Earth, but have you ever wondered if we actually are the aliens?
Not only that but I am not sure if they really exist, in spite of on the other hand many astrologists have noticed that there are planets, far away, where could be some kind of life, however not only in fara away planets, some scientists say that even sometime a kind of live will be able to live in Mars.
True enough though other people think that they are already here, between us, dressed up as humans, in the most unexpected places, where we cannot realize, as we can see in the "Men in Black" film.
To sum up remember this, I am warning you, watch out, they could be everywhere.