I believe there is something out there, maybe BILLIONS of LIGHT YEARS away, but there all the same. But as far as visiting this planet is concerned I always like to think of it like this.

Say it is us that find life first. We come across a planet with sentient living beings. They're not as advanced as us (we've discovered the warp-drive), they've only just discovered the wheel.

What would We do? The first thing we'd do is more than likely check out the planet's resources. Technology uses a lot of these. Then when we discovered the richness of it as the inhabitants technology is limited to cutting down a few trees. We'd go and take it. Maybe the Aliens would put up a little struggle, but they'd be no match for us. We'd take everything they had and then try and teach them how to form Governments. Most of our major advancements have come through WARS.

Now turn it around.