The universe is a pretty big honkin' place, no? Nearly infinite.
On a scale of 1 to "holy shit that's expansive," it's a "my fragile little mind cannot comprehend this scale"
It's pretty safe to say that there's other life out there somewhere.
Imagine what sort of life that would be. Could be. They wouldn't be carbon-based, bound by gravity, or even exist on phenomenon imaginable by us. An entire planet could be sentient. The atmosphere of another planet could hold an entire species of gas-based life or something. Hell, there could be another planet exactly like earth where evolution worked out relatively the same as us.
Wild stuff here, people.
*Can you believe that word isn't in the Firefox dictionary? Yeesh.