Search Results: breaking news to a friend

So, my ex girl friend and I began talking to each other again. We're very kind to each other and even friendly. Sending memes, talking a little bit. Nothing to personal yet from her side though. No I missed you's or anything. It's hard for me because I was the reason we broke up and she is so good for me. She went from not giving me the light of day to speaking with me again. Though I start the conversations. Should I try to respark the romance I once had? Or should I settle for what I've got now. As of rn she's guarded and I understand that. We drug each other through hell for 3 months but we were just unhappy and she thought breaking up with me was for the best. But now that the new decades here and I've had time to reflect. Do you think I should try and get her back in my life?

A few years ago, my ex came back into my life after breaking up with me because of her religion. We didn't speak for two years, and that night we were on the phone almost 6 hours.
After a few weeks of talking, I told her I still had feelings for her, and I couldn't just be friends. She didn't understand, and it was at that point I told her I had been in love with her. Then it clicked for her.
Over the next year, we dated, she fell in love with me and she made an attempt to make the relationship work. I even proposed to her. Then she decided to go on a mission.
She broke up with me after a few months, then spent two months trying to convert me. She stopped responding to me, and when she came back, I tried talking to her. She accused me of doing things and treating her in ways I didn't do. She blamed the whole relationship failing on me. She saw nothing wrong with what she did, and just talked down to me.
I couldn't understand why she'd treat me so horrible if she loved me. But she got married less than 6 months after returning.
Since then, I turned myself around. I have a new girlfriend, I've gotten into good shape, and grew out a beard and keep up with myself. I've seen her in passing, and she always gives me an unusual look.
My friends say she give me 'I miss you eyes' but I don't see that, but I'm not too concerned either.
At the same time, I hold great pain, anger and resentment towards her for what she did and I haven't been able to let it go even a year later. I feel she shouldn't be forgiven for how she treated me, but I'm so angry whenever I'm around her because of the pain she brought me.
In this circumstance, is it wrong to not forgive someone?