Aita For Exposing My Boyfriend's Secret Affair

AITA for exposing my boyfriend's secret affair in front of his entire family and friends? I never thought I would do something like this, but I felt I had no choice. It all started three months ago when I met Thomas. We clicked immediately. He was charming, attentive, and seemed perfect. I never suspected he was hiding something. We started dating seriously, and I thought I had found my soulmate. Then I noticed little things. He was secretive about his phone. Always hiding it when I entered the room. He would get defensive if I asked about his whereabouts. I brushed it off as paranoia or insecurity. Then one day I found a hidden folder on his laptop with hundreds of messages to a woman named Lisa. I felt my stomach drop. I confronted him that night. He broke down and confessed that he had been seeing Lisa for over a year. He claimed it was just a fling and he never meant to hurt me. He begged for forgiveness. I was devastated but also furious. How could he lie to me for so long? I decided I needed to confront Lisa myself. After some digging, I found her social media profile. She was gorgeous, confident, and seemed genuinely unaware of my existence. I arranged to meet her secretly. When I saw her in person, I realized she was not just a random girl. She was someone I knew from my own circle. It hit me like a punch in the gut. Lisa was my best friend's cousin. I could not believe I had been betrayed by someone so close. I felt humiliated and angry. I decided I would not let him get away with this. The next day, I planned to confront both of them. I went to Thomas's family gathering where everyone was celebrating his birthday. I waited until everyone was gathered around. Then I took out my phone and played the messages I had saved. The room went silent. Thomas's face turned pale. His family looked shocked and disgusted. Lisa was there too, staring at him with wide eyes. I told everyone how he had been cheating for over a year. I exposed everything. Thomas tried to deny it, but I had proof. I told him he was a liar and a cheat. I never wanted to hurt his family, but I could not stay silent anymore. The fallout was immediate. His parents were furious. His siblings were disappointed. Thomas was humiliated. Lisa left crying, realizing she had been played. I felt a strange mix of relief and guilt. I never wanted to cause this much pain. But I also felt I had to stand up for myself. Now I wonder if I did the right thing or if I am just making everything worse. Was exposing him too harsh? Or was it the only way to finally get justice? I still feel the sting of betrayal. Sometimes I wonder if I will ever trust anyone again.