Three years of high school changed the whole character of an individual which was carried since childhood.
Teachers taught me to be ready with any of circumstances. They helped me know who I am and what I can do. School has taught me to be independent. If the path which you are following is correct then no need to worry what others speak behind you. Just follow your path and you will reach the right destination.
Finally, have confidence that you can change your life better. Never depend on anyone. Never accept when you are not wrong, and never change the path when you are on the right one.