Hi, Chris.
You are an amazing soul.
I don’t support what others say here – forgive her. You tried hard but it doesn’t come to you.
The positive thing is – you are not exploding in your anger (you did, but cmon who doesn’t sometimes), I hope you dealt with it and managed to forgive yourself. Next step to forgive someone who has hurt you.
Here stop for a while. Why not being angry? If you push yourself to forgive, you ll have suppressed emotions to deal with in the future. Stay in your anger, it’s not destructive if you see it clearly.
If you practice meditation, meditate on this feeling. It should leave naturally, don’t push it. Im not good at this myself yet 🙂 but Im trying, I believe we have rights to go fully through our emotions. Accept yourself as angry, you are not bad if you are angry. It would be bad if you went on for revenge, but experiencing anger doesn’t make you bad.

It will go naturally, give it a time, maybe long time, unfortunately, we all have our lessons to learn. Im sure it’s given to you to understand something about yourself, although it’s quite cruel way.

What you say and HOW you say it makes me think you are an amazing soul.
I wish you all best
Namaste.