what makes you believe that we are the only human living in the entire universe?

Odds even for a gambler will bet their money on the fact there are other forms of life or intelligence in the universe even though we dont know of them ,it will be very vain of us humans to think we are the only intelligence there is! Think of it,trillions upon trillions of stars,our milky way just one tiny galaxy out of billions upon billions in the universe,so how many trillions upon trillions of planets are formed and what are the odds of these planets having intelligent life?

I don't really believe that we are the only humans in the entire universe...there are a lot of universe and tons of galaxies in universe..no one has ever been outside our galaxy either. I'm not saying i believe in aliens, but maybe there are others out there..very far far away..nothing's impossible

bcoz still we did not find any soloid proof of aliens..hahahahaa