Why haven't aliens found us yet

I don't buy any of the theories like that they want to leave us alone or we are not ready for them.

People always assume that aliens are so much more advanced than us, but we don`t know that. What if they`re equally or less advanced than we are? Just like we haven`t been able to find or get to them, they may not be able to travel far enough to reach us yet. Or they may not be as curious as human beings are, so they`re not even trying to explore space. Or they`re not very intelligent creatures at all. I mean really isn`t an alien life form just something living on another planet? It could be a single-celled organism, like a bacteria. Even if it is large enough to see, maybe its no more intelligent than a fish, or a dog.
Personally, I believe that some kind of life on another planet does exist. I mean, out of a universe too big for us to even comprehend, and millions of solar systems that we haven`t been able to explore, chances are there is some kind of life somewhere else. But we shouldn`t assume that just because we`re intelligent enough and curious enough to explore the universe and want to find them, that they are the same way. There`s always a chance that they`re a million times smarter than us, but don`t really care enough to come find us. They may not have the same curiousity as we see on Earth.

There's theories they have already found us but don't seem to care. I don't know. As long as they don't dissect me then I am all good with them. Maybe it's us who haven't found the 'aliens'. Maybe they're not too advanced as fiction says. We don't really know but in time we shall.

I don't think they are willing to leave us alone.

I believe that they first made themselves clear to us in the 40's when we started testing Nukes in the desert. I mean, honestly...how could it be a coincidence? All those sightings in New Mexico and Nevada during that time.