Are we alone?

There are milky way, andromeda, cigar galaxy, tadpole galaxy, sombrero galaxy and many more. And each galaxy contains more than billion stars and each also has their own solar system and in that solar system, there are planets. And those galaxies are only in our local group of galaxies or nearest galaxies from our galaxy. As far as I know, there are more than 50 galaxies in our local galaxy and there are more to be discovered. And beyond that, there are more than 150 millions galaxies in this universe with their own stars and planets. 

And then there is earth. The only planet with living things. Or at least that's what people said.

But doesn't the thought of being alone in this big incredible universe scare you? This is a big universe and there are so many endless possibilities, even humans cannot answer so many questions about our universe. There is no technology advanced enough to go beyond our galaxy. The universe is simply endless and the thought of being the only living thing with brain in this universe is somehow scary and... saddening and it makes me feel so small. Are we really alone in this universe?

But the thought of not being the only humans in this universe is scary, too. There is always a possibility that there are people (or something) out there living in their own planet and thinking that they're alone too or maybe there are people (or something) out there living in other galaxy and they now about earth and us and their technology are so developed that they are capable to watch us and set their foot on earth. Maybe they know about us and how we wonder about their existance but they just keep their existance hidden.

It's like we don't want to be alone in this universe and we also don't want to discover the possibily of other living things.