The Universe is really big

yet its nearly impossible for any alien to come to us. the nearest star to us is alpha centuri, which is 4.2 light years away from us. there can't be any alien living in the alpha centuri star system b/c of its 3 suns. the next closest is barnard's, which is 5.96 light years away from us. if einstein's theory is right, and if the technology of the alien have to go at the speed of light, it is still nearly impossible for them to travel to us because of the time it takes. 5.96 years of traveling nonstop. i dont think its possible for a spacecraft to travel long distances with an efficient supply unless they shoot their planet (their own perfect spacecraft) to us.

the fact that it has 3 suns is not the reason why there can't be life there. in fact a large number of stars are binary or trinary systems (about 1/3). It takes a long time to travel, sure, but that's far from a show stopper. Ever heard of a "generation ship"?

Beyond that, there are possibilities to avoid relativity while effectively traveling faster than light. For example, a wormhole creates a bridge which is much shorter than if you tried to go around the long way. It makes the two points physically closer, but you would still probably need to travel below lightspeed to cross the bridge. From the perspective of normal space, however, they'd have traveled a massive distance in a short amount of time - essentially, faster than light.