Our whole relationship was a bet

AITA for going through my fiance phone and finding out our whole relationship was a bet. I am still shaking as I type this. Let me start from the beginning. My name is Rachel and I am twenty six years old. I have been with my fiance Dylan for two years. We got engaged three months ago and I thought I was the happiest woman alive. Dylan is charming, handsome, and everyone always told me I was lucky to have him. Looking back now I realize how wrong I was. Last night his phone kept buzzing while he was in the shower. I never snoop, but something felt off. His best friend Marcus kept texting things like remember the deal and payment is due soon. I opened the messages and my whole world collapsed. Two years ago Marcus bet Dylan five thousand dollars that he could not get a serious girlfriend to fall in love and propose within two years. Dylan took the bet because he needed money for a car. I was not a person to him. I was a bet. I was a paycheck. I read message after message where they laughed about how gullible I was. Dylan wrote things like she actually thinks I love her, this is easier than I thought. My hands were trembling so hard I almost dropped the phone. When Dylan came out of the shower I confronted him immediately. He turned pale and tried to grab the phone from me. He started stuttering excuses saying it was just a joke that got out of hand. I asked him if he ever loved me at all. He hesitated for too long before saying yes. That hesitation told me everything. I threw my engagement ring at him and told him to get out of my apartment. He refused, saying he had nowhere else to go since he moved in with me eight months ago. That is when things got even messier. I called Marcus directly, since apparently he was the one holding the money. Marcus actually answered and sounded terrified. He admitted everything was true and even said Dylan had been planning to break up with me right after the wedding to keep the money and avoid a divorce settlement. I felt sick to my stomach. Two years of my life, my love, my trust, all for five thousand dollars. I packed a bag and left to stay at my sister house that night. My sister was furious and wanted to drive to my apartment to confront Dylan herself but I stopped her. I needed time to think. The next morning I posted about it anonymously on social media, not naming him, just venting about the situation. It went viral within hours. Someone recognized the story and messaged me privately, saying they knew Dylan from college and that this was not his first time doing something like this. Apparently he had done a similar bet with another woman years before I met him. My blood ran cold. This was a pattern, not a mistake. I decided to expose him publicly with proof, screenshots and all. Within a day his job found out, since Marcus worked at the same company and people started talking. Dylan got called into human resources because apparently their company had strict rules against this kind of public scandal affecting their image. He lost his job within a week. Karma moved fast. He started texting me nonstop, begging for forgiveness, saying the bet started as a joke but he really did fall in love with me somewhere along the way. I do not know if I believe him anymore. Trust is not something you can rebuild with pretty words after something like this. My sister thinks I should take him to court for emotional damages since the relationship was based on a manipulative bet from day one. My friends are split. Some say I should forgive him if he truly grew to love me. Others say once a liar always a liar. I keep replaying every memory, wondering which moments were real and which were just him performing for money. The engagement ring is still sitting in a drawer, and I have not decided what to do with it yet. of me wants closure and part of me wants revenge. So tell me honestly, am I the villain for going through his phone, or did I just save myself from a man who saw my heart as nothing but a bet.