A couple of nights ago my gf was supposed to meet my friends. I've been delaying the process for months because I knew I had to have an uncomfortable conversation first. I met my friends at an orgy. My roommate at the time asked for my permission to host an orgy at our flat. I said yes, as long as my room and my belongings were off limits and the flat was cleaned properly afterwards. My plan was to spend the night at my mom's house and be out of everyone's way during the orgy, but my roommate encouraged me to stay and participate.

I was still a virgin back then. The thought of sleeping with one person was overwhelming enough, let alone a group of people. However, my roommate eventually convinced me to take part. I was added to a group chat with all the people who were gonna be involved in the orgy. All of them made me feel really comfortable. That being said, when the orgy finally happened, I was unable to have sex with anyone. My anxiety won. Everyone was understanding though. Life went on.

My roommate became my ex roommate after a few months, but we never stopped being friends. The connections I made with the people at the orgy also developed into friendships. We're still friends now. My gf didn't know my history with them until earlier this week when I finally had the courage to explain the orgy story. She was shocked and disturbed and asked if I lied to her about being a virgin when we met. I said no. She struggled to believe that a virgin guy would walk away from an orgy with his virginity still intact.

My gf made it clear that she was no longer interested in meeting my "friends." She said she didn't know how she could be in a relationship with someone who was friends with people who shared him. I asked my gf if she was breaking up with me and she said she was gonna need some time to decide what to do. Last night she decided. Our relationship is over.

TL:DR I told my gf that I met my friends at an orgy. That was all she needed to hear to break up with me.

Edit:

I never had sex at the orgy, but I did end up kissing my roommate AND another girl did go down on me. I didn't leave out that information to make my gf look like the villain, at least not intentionally, this is my fuck up after all. I should have provided a link to my previous post that explained everything or included the kiss and the BJ when I initially posted on this sub. It's understandable that my gf is uncomfortable with my past because my past is still part of my present due to the friends I have.