Well, I'm not sure what the ex T did and how long it's been or where you are in processing it. In my mind anger is a correct and honest reaction to being wronged. Now, staying angry for life will not be to your benefit of course, but being angry when wronged none the less is important and necessary. You cant "just forgive" like people try to tell us to do.

Forgiveness is a process, and IMO it's a process of understanding/having compassion for the person who wronged you, accepting what happened, and moving on from what happened. Once you've processed your anger, which can take different times for different people/wrongs, then you can start to try to forgive.