Soldato
You say that as though it's a matter of fact
Think of it this way - we actually know how to travel great distances through space in theory, we just lack the ability to actually pull it off yet. Compare that to - for example - when we were learning to build a flying machine (not that long ago) and were fumbling around blind......machines that flap, getting up a head of steam and plunging off a cliff, etc, etc. Eventually we worked out that it was the shape of the wing that mattered. So in a way, we're in better shape to eventually traverse the vast distances of space than we were of building an airplane. We understand the science - we just have to wait for the technology to get there.
I think it's a pretty safe bet that we'll be flying off to other galaxies in hundreds of years from now.......assuming we're still around as a species. And when we do, we'll probably find a planet full of aliens that hang around on forums saying "pffft - aliens LOL you nutter"