Three way from hell??

I am so hurt & I feel so alone. So my BF & I had a three way with my best friend. He ended up penetrating her which we agreed was not ok. I got super upset & ended up crying in the bathroom & THEY KEPT FUCKING!!!!! Then my BF comes in & tells me they've been hooking up for a while. I'm so mad & hurt & idk what to do. They're both dead to me. I'm thinking about fucking my ex's best friend or my best friend's (ex best friend) ex. Thoughts?