Three Month Marriage

I have been reading your book ‘The Path to Love’ and it has helped me understand myself a lot better. I realize the importance of the spiritual perspective of the marriage. I was able to identify areas where I was lacking as a partner. I am going through divorce from a 3 month marriage. My soon-to-be ex-wife left me because I could not meet her expectations of keeping her happy. Even though when I requested her to go for marriage counseling she refused and surprised me with sending divorce papers in mail. Obviously it left me devastated. I then started reading Eckhart Tolle and your books. I am doing much better emotionally and physically now compared to what I was couple of months ago. But I still find anger and resentment in my heart towards her and her family. I know that it is my ego which is making me feel that way, but I am finding it difficult to get past it. There are days when I feel sorry for her, because I realize that she is driven by her ego. But the days when I
receive or have to send legal papers or I get an email from her, it disturbs me and makes me angry. I never wanted to be in this position, I was willing to do everything to save my marriage but she refused to even acknowledge my efforts.
I would like to know, how can I train myself to not let anger control me and more importantly how to forgive her.