When I was 20, my girlfriend that I had been with for 3 years dumped me. It killed me. I felt like a shell of a man. I had no desire to eat, I was plagued by insomnia, and all I could focus on was how to get my ex girlfriend back.
At the time, I had no clue how to get over a breakup. It was difficult for me to admit that any part of the breakup had been my fault, and by condemning my ex for all of it, I wrecked any chance of getting her back.
Take this chance to learn from my error. Rebuilding your relationship with your ex starts with you assuming ownership for the part you played in the relationship’s end. Buck up and acknowledge where you screwed up, and take the steps needed to show your ex that you are worthy of her. If you’re not willing to do that, getting your ex back apparently isn’t as important to you as you act like it is.