Maybe they are avoiding us because we are primative, aggressive creatures...we are the Aliens to them.
Perhaps we should consider this question a little more "Holistically".
Planet Earth is Approx 4.5 billion years old, we are part of a Solar System that, with our sister planets, revolves around our Sun.
Our complete Solar system is apparently situated in a relatively quite neighbourhood, approx. 2/3 or so distance from our Galaxy centre (the Milky
Way), on one of the many spirals of our wonderful Galaxy.
If you were to observe our Galaxy from afar, it appears similar to our sister galaxy Andromeda, also a spiral galaxy.
If you could pinpoint the approx position of our Solar system, in our Galaxy, you would observe that our Solar system is but a tiny glow, in a cluster
of stars that make up a spiral, that is in a cluster of 100s? 1000s? of spirals, that are contained in our Galaxy, with a large centre cluster
"Nucleus" in the middle.
While, to our perception and understanding, we seem to be in the middle of nowhere, the way our puny human minds can comprehend, we are in fact,
Surrounded by 100s of thousands of Stars and Solar systems, maybe millions of them that make up our little tiny part of the Universe called the Milky
Way. Potentially there are Millions of other planets just like Earth, in our Galaxy "City".
How the Stars developed in our Galaxy, I have no Idea. Were they created in the centre, then spread out? Who Knows? Are new stars and Solar systems
being created in our Galaxy's Nucleus? Who REALLY Knows?? (the Aliens might)
So here we are, in our little tiny patch, in our lovely Galaxy, surrounded by Millions of other Solar Systems and planets, minding our own business,
dreaming that we are alone.......
If life happened on Earth, 2/3s along one spiral of our huge Galaxy, WITHOUT a DOUBT, the same Chemical Reaction occurred on other planets within our
own Galaxy..........We probably have Millions of neighbour planets, containing intelligent life.
AND our Galaxy, is itself, only one of MILLIONS, Possibly BILLIONS in the Universe!
Please everyone, open your minds and look at the BIG picture.
We are Not Unique....Sorry. Start thinking logically people.