Reliving my past

Is there a way to send myself back in my past to change an aspect of my life and life from that point on? The memories of this life being nothing more than a dream.

Nope. The past is in the past. No redo's. What you can do, however, is change the way that affects you now, and what you will do in the future. It's as easy as choosing to do something different.

You can't change the past, my friend, you can only strive to create a better future. Every single one of us at one point has wanted to change the past/our past but it's good that we don't have that ability. Not only would it be used irresponsibly but also because our past is who we are. Every single experience you have had in your life is in the past. Your experiences, no matter how big or small, pull together and what it creates is something that cannot be replicated; what it creates is you! Don't worry about the past, if anything use it to grow and create a better you in the future.