Son of a bitch, TBT you know something most that roam this earth are not aware of; we live in a universe that is Infinitely Small and the Infinitely Large. I think we are a type of cancer on a living cell; once we are able to travel from cell to cell in this universe, we'll destroy it.
I honestly don't think we will ever make it out of our own solar system, let alone make it to another star. The vastness of space and the rules that govern it pretty much make it impossible for this to happen. We are years away from even sending someone to Mars, and distance wise is comparable to moving a couple of inches off the surface of earth and the nearest star being the moon.
The cosmic speed limit and the amount of energy to even make it close to the speed of light require some form of energy source that probably doesn't exist. That coupled with the question nobody ever discusses if we were to even try to leave earth. Humans need the earths gravity for a baby to be born. The extremely short life spans of humans compared to the amount of time needed to travel great distances just doesn't add up.
Also ever heard of the Fermi paradox?