How do I stop reliving my past and dreading my future?

Number one, the time machine. Life can only be lived in the present, and in fact all of real life can only be spent in the present. And specifically, the way that we approach life must be one of prayer. So for a person to pray, they cannot pray in the past. They cannot pray in the future. They can only ever pray in the present. But so many people get locked into exploring and remembering childhood traumas, or going into scenario buildings about what could happen or go wrong in their life. And so they're constantly fighting two extremes: the anxiety of the unknown of the future, and the resentments or the hurt or the failures of their life that have already transpired. I noticed for myself, one of the biggest moments in my life was when I realized that I had so much resentment against my father for what had basically failed to transpire in having a good and healthy childhood and relationship or connection with him, or any of those things. But I realized it in my mid-20s, and I realized that all that regret about my childhood that never took place was governing my adulthood, in which I was looking to have children. And so it was that until I was willing to get out of the time machine, until I was willing to stop looking at all the things in my life that went wrong and all the regrets and injustices and whatever else, and they were valid, but until I was willing to close the door on that chapter of my life through forgiveness, through seeing my own part, through repentance, and through letting it go and absolutely absolving everyone involved of any wrongdoing, until I was willing to do that, I constantly was in the time machine, reliving past problems, reliving past abuses and hurts and anger and all of these other things. Furthermore, as long as I was in that time machine, I had to stop going into the future. I kept creating scenarios in my mind of the things that could happen, the way that life could unfold, the disappointments that might spring up unexpectedly. And it's the same thing. You have to close that door on the time machine and approach every single day exactly as what it is, which is, every day is some form of mystery, uncertainty. It has to play out before you and you have to stay in the present. When we talk about praying, Lord Jesus Christ have mercy on me, which as an Orthodox Christian we need to be praying all the time, the only time for me to pray it is right now, in this moment. It keeps me grounded in the now. It keeps me grounded in what's happening today, and it keeps me out of the past regrets and the future anxieties.