I found out my friend group kept a secret from me for 2 years

This all happened 3 years ago (when I found out). Before I say what the secret was I need to tell you about the situation from my point of view. So in the summer of 2019 I had a group of friends who I hung out with often, we were all around the same age 18-19. There was “John” my best friend, “Susan” who I was dating, and a couple of others. John was dating Susans best friend “Annie” which will become useful later on in the story to understand why certain actions happened from John. We all graduated highschool and were about to start college in a couple of weeks. I was going to go to a school couple of hours away from our hometown while Susan was staying in the city for college. Susan told me she didnt think we should be seeing eachother anymore because of the long distance, we were just a couple of weeks into dating, but it made sense because its not a great way to start a relationship off being long distance and all. We agreed to stay friends though. So once I move away and start school Susan and I still talk but as the months go by I can tell shes being distant with me and we end up not talking to each other anymore, no bad blood just kinda fizzled out. During this time Susan had to go to a different state for a family emergency and stayed there for months. I didnt bother to ask her what happened because I only found out through John and he didnt know either, at least I was told he didnt know the real reason. So when Susan came back from being out of state, Covid had happened and I had to move back home from college. The whole friend group was back in our home town and we would hang out normally just as before, besides being safe about Covid of course. This went on for a over a year where we all hung out and Susan and I were friends again, she even drove a few hours for my birthday party that was in a different city. Thinking things were back to normal I went to see some of my friends, who were part of the friend group, it was just the 3 of us no John, Susan, or Annie. While we were hanging out one of them asks me why I think Susan was out of state for awhile and I said because there was a family emergency. They asked what the emergency was and I had no idea. They then said to me that she was gone for about 9 months so why do you think she was gone. I paused for a bit and asked was she pregnant or something. They said yes she was pregnant and that I was the father. I was shocked I couldnt think at all. They then told me everything that had happened since the summer of 2019 before any of us started college. So it was no secret among the friend group that Susan and I had been hooking up, in fact it was John and Annie that had set us up to begin with. We never officially dated but had been hooking up and seeing each other outside of the friend group. When we talked about not seeing eachother any more because of the long distance for college, that was a lie, she didnt want to see me because she knew she was pregnant and knew I would have wanted to be there for her and help raise our child. She didnt want the child at all. Once she found out she was pregnant she told Annie and of course Annie told John. But Susan told everyone in the friend group NOT to tell me about it. Everyone in the friend group knew Susan was pregnant with my child. So John, being my best friend for more than a decade, didnt tell me about it for about 2 years, I expected more from him but I think he didnt tell me because he was dating Susans best friend and didnt want to upset her. Susan wanted to get an abortion but her mom found out and stopped her from doing it. So her mom made Susan go to her Aunts place out of state for the duration of the pregnancy. This was the family emergency that I didnt know about. Susan did give birth to a boy and the boy was adopted. I didnt know about a single thing until after the boy was adopted so I had no say at all. When those 2 friends told me everything they also told me they have been wanting to tell me since the beginning, but figured it should at least come from Susan or John. Susan was never going to say anything so they kept pressuring John to tell me except he never did. He was my best friend and didnt tell me anything and kept a huge secret from me. He had plenty of opportunities, could have told me at the beginning, or once the boy was adopted, or any point during but he never did. I was betrayed by my best friend and I decided to cut contact with him and the entire friend group. At first I only cut contact with John, Susan, and Annie but later on I decided its best to get away from that entire friend group even though I appreciate what the 2 other friends did for me by telling me. I highly doubt there will be any updates to this story because it happened 3 years ago and I havent talked to any of them since that time. Thank you for reading my story