You can't forget the past, you have to talk about whatever you have not been able to work through somehow. The only thing you can do is "learn" from the past and finally do your best to "grieve" it, and work on ways to move on "inspite" of it.

I do understand what you mean about other people telling you to forget it. That cannot really take place with PTSD. You have to be validated, comforted, grieve it and settle it and it takes time to do that with PTSD.

I will say, that as hard as it may seem, you can't keep holding onto the anger. I have been very challenged by that myself, but I try hard now to talk myself out of needing to be angry. Anger brings on too much draining and negetive energy that is not good for the brain. So now I do my best to let go of thinking I have to "feed into anger".