I have two close friends in the university, Alice and Bob, who I've known since the first year. As the weeks passed, I felt less and less apart of our little group and I think the reason was that they started to date so I felt a bit like the third wheel. Around the end of the first semester, they had a really bad break up. I asked both of them what happened but each told me a different story. Since then, I've spoken to and met each individually more and more regularly and have now formed a good, meaningful friendship with Alice and Bob, independent of each other.
Their break up was almost two years ago. Alice told me that she is over it and she would not mind if the three of us were to get together sometime. Unfortunately, Bob is still very upset and he gets very angry if I mention Alice.
We will have the state exams soon (almost the same time) and I told Alice how nice it would be to celebrate after the exams are done. I haven't even tried to present the idea to Bob yet.
Now I have no idea how to resolve this situation because I am really afraid to lose the friendship with one or both of them if I celebrate with the other person. I have only a few friends, but it makes me anxious even if I just think about making one of them sad or upset.
I would like to find a way to celebrate with them, without harming the friendship with Bob or Alice