I am sorry you are going through this. My ex- husband and I divorced four years ago. He was very verbally and emotionally abusive. When I filed it shocked him and he finally went for the counseling and medication that he needed. The divorce was amicable, although he didn't want it, he didn't give me trouble about it.
But we still do things/parties with our friend group who were all college friends of his. It is difficult that I can't talk to any of the girls about my situation. I have found it odd that not one of them have even brought it up with me and when i try to I'm shut down quickly.
I've worked on building a friend group for myself that has nothing to do with my ex- husband. We need girlfriends that we can talk to. I know it is hard, but try to find friends outside of this group!