Is There Any Alien in the Universe?

I do believe in aliens, but i am not sure that they've been to earth. The universe is so big, i think it's very unlikely that any aliens would have come to earth. Any u f o sightings at area 51 might have been military aircraft tests,. It might have been these tests. So maybe the us. Military have these, like, really advanced flying drones and things like that, and they're testing them around the desert there. But iam than happy to believe in aliens if there's some proof. Let me know what you think about that one, too.