Life is just a pointless video game anyways. There will be a day when you, me, and the entire universe will come to an end; and everything mankind has worked towards will have been all for nothing. So just enjoy the ride, whether it's playing video games or traveling the world. You only waste time if you perceive it that way. There's no golden standard for how you need to live your life. If you feel unhappy though, then just do something else. Don't spend your time wishing you could redo those years. Start doing things that you feel are more fulfilling, then you will no longer care about the past.