I found once I was away from the chaos and had time to straighten out my thinking floods of stuffed emotions came flooding back. Sadness, anger, sorrow of things lost. I think it is part of taking the focus off the addict and refocusing on oneself.
Feel your feelings but you do not have to take any action because of them. Feelings are not facts but some facts invoke strong feelings.
I completely understand the friendship issue. I no longer have any close friends that I share my secrets, wishes and hopes with. I do miss it sometimes. I do have a very few friends that I know would be there for me if I ever needed anything but those took quite a while for me to build up. I just don't make friends easily. I am learning to be ok with doing things by myself.
"Good times" look differently to me now days, not good or bad, just different.
Just wanted to give you some support and let you know that I understand.