Night Road

I just finished reading the book Night Road by Kristin Hannah.There are the two twins Zach and Mia that end up becoming best friends with a girl named Lexi. They have all had some issues in the past but once they all become friends they forget all about it. They do absolutely everything together until Zach and Mia begin to fall for eachother which causes some bumps in the road.  Eventually they all work it out and they become stronger friends than ever before and do everything together. One night their mother Jude decides to let them go to a party because they begged her, and that was the first mistake.  After that everything falls apart because of one decision they made at the party.  After that decision some people lost a best friend and others lost a major part of their family. Nothing was ever the same and families were torn apart. At the end of the book they would give anything to go back and make a different decision. So my question is, has there ever been a time where you have made a decision that has changed your life whether it was something little or something major? Has it impacted your life somehow? Would you do anything different? Do you regret the decision you made?