Best Friend Betrayal Went Public

AITA for exposing my cheating boyfriend after I found out he was cheating on me with my best friend? I never thought I would find myself in a situation like this. It all started a few months ago when I met James. He was charming, funny, and seemed genuinely interested in me. We hit it off immediately and started dating. Things were perfect at first. I felt like I had finally found someone who truly understood me. But then I started noticing small things. He was suddenly very secretive about his phone. He would hide it whenever I came close and would get defensive if I asked to see it. I brushed it off at first, thinking maybe he was just private. Then came the night I decided to check his phone when he went to the bathroom. I never intended to invade his privacy, but curiosity got the better of me. What I saw made my blood run cold. There were messages between him and my best friend, Lisa. They were talking about sneaking around, planning secret meetups, and even exchanging flirtatious messages. I could not believe my eyes. My best friend and my boyfriend, together behind my back. My heart shattered into a million pieces. I confronted James immediately. His face turned pale, and he tried to deny everything. But I had proof. I told him I knew about the affair and that I was done. Then I told him I was going to tell Lisa what I discovered. That is when things got even messier. The next day I met Lisa. I thought I was ready for the truth. I thought I knew what to say. But when I saw her, she looked so guilty. I decided to confront her directly. I showed her the messages. Her face drained of color. She broke down crying and admitted that she and James had been seeing each other for months. She said she never wanted to hurt me but that she was weak and made a terrible mistake. I felt sick. I never thought my best friend would betray me like this. I told her I needed some time alone and left. Later that evening, I posted everything on social media. I exposed James and Lisa with all the screenshots and details. I wanted everyone to know the truth. The response was overwhelming. Friends and family flooded me with support. But the twist I never expected came when James called me that night. He begged me to forgive him. He said he was sorry and that he still loved me. He promised it was all a mistake and that he would do anything to fix it. I was torn. of me wanted to believe him. of me wanted to erase him from my life completely. But then I found out something shocking. I discovered that James had been cheating on me with Lisa for over a year. Not just a few months. All the lies, all the betrayal, it was much worse than I thought. Now I am left wondering if I should even consider giving him another chance or if I should just cut him out forever. Do I risk trusting anyone again after this betrayal? Or is it better to walk away and start over? I do not know what the right choice is. All I know is I am hurt and angry and I do not trust anyone anymore.