Feel guilty
Back in my undergrad years I ended up falling hard for someone in a several year relationship when we first met. She told me she needed some time to end the relationship with said person but never actually got the courage to do so. Sadly at that point I knew I would rather have a bit of someone than none at all so I never said anything. Fast forward a bit less than a decade later that guy got engaged and I ended up telling him about it because it continued that whole time.
As far as I know the engagement is still on and all I can think is I did something wrong telling this because it just hurt a bunch of people and severed my “connection” completely. I truly do not know if it was the right thing to do but rather what I would want if I was in those shoes.