Yes, the Universe has been around for about 13 billion years, the earth for about 4.5 billion, humans for 10 to 20 thousand... we are drops in an ocean. But to say all that expanse and we are tiny proves there is no God assumes

1. That God experiences Time the way we do, which I find impossible
2. That we humans are the only thing He has ever wanted to create
3. Just because we haven't found other life there can't be any out there. We've only been looking for a few decades at best. And remember, anything we find will have been transmitted thousands or millions of years ago. They would be too far away to have found.