Most Helpful Girl
I know this sounds terrible, but she's your ex wife for a reason. I was so in love with my ex. I thought we were going to grow old together, and then one day, out of the blue, he said he wanted to be independent. So we broke up. Then he went to China and fell in love with a girl and is still dating her. I never thought I would move on. And now it's been two years. I realize now how controlling he was and how I deluded myself, and how he never accepted me for who I was. Time heals everything. I saw him the other day and I felt nothing. All that amazing chemistry we had, all that passion was gone. Even if it seems impossible, I promise you'll get over it. You won't forget it, but you'll emotionally move on.
Most Helpful Guy
Move forward with your life. Better yourself in every way you ever spoke to her or dreamed about. Be the best dad on the planet and do right by your son. Never say a bad thing about her to anyone. When you see her, don't pry or ask about things that will tick her off. Don't contact her ever unless it pertains to your son and is absolutely necessary.
There's no guarantee, but if you want any kind of chance this is a good start. Maybe, just maybe, later on down the line she'll remember the good she saw in you in the first place. Good luck brotha.