http://www.abc.net.au/news/2016-01-27/parkes-astronomists-unfazed-aliens-could-already-be-extinct/7116256
Here is a news article trying to explain away the fact that why we have not found aliens yet. Firstly, the reason people think there should be aliens is that there are so many stars in the universe. Because there is so many, there must be some which have planets, and among those planets there must be some that can have live, and among those planets with life, there must be some that have intelligent life like us humans. The argument is simply because there is really so so so many stars, even if the other conditions are just a fraction, then that fraction is still big enough for there to be intelligent life out there.
The Word of God that we have received from Moses up until the Revelation of Jesus Christ recorded by John, only talks about The Almighty God and his relationship with us humans, and also intelligent spiritual beings such as angels and fallen angels. There is no mention of other physical intelligent beings. One can argue that that does not rule out extra-terrestrial intelligent life forms, but simply that God does not need us to have contact even if He had also created them. This is plausible, but our speculation would not give any concrete answer, only God can answer that question.
Coming back down to earth, the fact is that we have not found any intelligent aliens. Aliens are not in God's plans otherwise He would have told us about it. We should do well in attending to the things emphasised by God through His Word and focussing on how we can serve Him here on Earth.
Update 1 Feb 2021
Various people contributed to the post above to recount UFO-related events all over the world. The description of these events defy natural explanations as well as multiple eyewitness accounts that cannot be dismissed easily.
