With current technology and our understanding of physics, reaching another star within a human's lifetime is an incredibly challenging proposition. The nearest star system to our solar system is the Alpha Centauri system, which is about 4.37 light-years away. Even at the speed of light, it would take over four years to travel to Alpha Centauri, and we currently have no means of achieving or surpassing light speed.
The fastest spacecraft humans have ever launched, such as the Voyager 1 and Voyager 2 probes, are traveling at speeds of about 17 kilometers per second (10.5 miles per second). At this speed, it would take tens of thousands of years to reach Alpha Centauri, which is clearly impractical for a human mission.
There have been numerous proposals and concepts for interstellar travel, such as solar sails, nuclear propulsion, and even concepts like the Breakthrough Starshot initiative, which envisions using powerful lasers to propel tiny spacecraft to a significant fraction of the speed of light. However, these concepts are largely theoretical at this point, and there are significant technological and engineering challenges to overcome.
Given our current understanding of physics and the limitations of our technology, it is unlikely that humans will be able to reach another star within their current form and technology. However, it's important to note that scientific progress is ongoing, and advancements in technology and our understanding of the universe may lead to breakthroughs that could change the possibilities for interstellar travel in the future.