My (28M) ex (25F) slept with my best friend (28M) and my friends are still inviting them to events with me
So a few months ago I learned my ex had slept with my now former best friend/roommate multiple times right after we broke up.
We got back together for a couple months until she finally told me what happened in the weeks we were broken up.
We had been together for 5 years and I had known my former friend since we were kids. Aftermath of this was messy and I obviously wasn’t happy and told my friend group that I didn’t feel comfortable being around them at parties moving forward.
They understood and let me know that I had control over if they were invited. This however only lasted one get together and the next event they were invited.
I asked my friend B why and his response was that he didn’t want to be involved in the drama and sorting the relationships out was my own problem.
I have tried to brush any feelings aside when I see them during these outings, but I’m just not myself and I’m not relaxed. I don’t know what is the right response to this because I have tried to communicate my feelings with the friend group, but they now seem indifferent.
Everyone still talks to my ex and former best friend just like they would with me. I have known most of these people in my friend group since high school and they are all the friends I have.
I don’t know how to move forward without totally exiling myself from the group, please help.