Self reflection is an important part of growing up. It is important to sit back and think about who you are and who you strive to be. I think that dwelling on the past too much can be extremely harmful, but that a little bit of reflecting on your past can be great.
Think about it, every choice you have made in your life so far has led to where you are now. Every single choice, no matter how small it may have seemed, has had a major impact on your entire life. The choices we make definitely change the path that we take.
Most likely, every friend you made changed your outlook something. Every place you went to will remain in your memories. Maybe you experienced something because of certain choices that led you to learn a valuable lesson.
Maybe those dreadful things of your past needed to happen to allow you to grow. No one deserves to hurt, but sometimes hurting then healing can be replenishing.
I think we should value our lives because they are so unique. No one on this earth will have had the same experiences you have. Even if someone was following you around 27/4 or was literally joined at the hip with you, they would not have the same life as you, because their thoughts would be different from yours and their perspective would be different as well.
You will never get the same day twice, so it is important to make every day the best you can make it. Try to laugh in stressful situations. Try to breathe when there seems to be no air left for you. It is vital to keep moving forward. If you look back, you'll trip on everything in front of you. Do not look into your past and examine your mistakes negatively. We grow from mistakes. We live and we learn. Use those mistakes as a study guide to become a better you. Use your past to your advantage and try to give yourself a better future.
It is important to know that life is a roller-coaster with twist and turns, peaks, and sudden drops that will make you feel sick to your stomach and scared for what's waiting at the bottom. But if you fear life, you will never enjoy the fun parts.
Look back and examine yourself but don't write a novel about your mistakes. Move past them and live a better life. Spread love, be kind, and be grateful for what you have overcome. Those hurdles you went through have only made you stronger.