I ruined a wedding to get revenge on my boyfriend who was cheating on me.

EDIT: I changed the title cause I wanted to make it more clear about what happened.<br><br>This was 4 years ago.<br><br>My ex and I were from the same town and we dated on and off for 4 years. We took a break after our first year together because of his infidelity and got back together 6 months later. He was honest about cheating on me and begged for forgiveness. I did and we got back together. He was great after that, he changed a lot and was honest with me and made sure to go through a polygraph test. We were together for another 3 years up until I caught him cheating on me again. I broke up with him for good and started to move on with my life. I dated 2 other men after him, but it didn't work and I was still hurting. One day he called me and told me that he was getting married and I was shocked because I didn't know he was even dating. He told me that they got engaged after 6 months of dating and he said that he's changed for good. We were talking for about 20 minutes until I realized that we were only talking about him the entire time and I didn't get to say anything and he wasn't asking me how I'm doing or anything. I confronted him and was angry that he was calling me to brag about his "happy" life. He didn't like my reaction and started yelling at me and saying that I'm the reason why he can't be happy. He started to make mean comments about me and calling me stupid and angry psycopath and telling me I'm a complete waste of his life. I don't know why but his mean comments made me extremely angry. A week later he sent me a text message to tell me that he will get married 2 months later and that I will never hear from him again.<br><br>During the next month, I was‐nt myself. I was so angry and frustrated and felt betrayed and used by him once again‐I don't know how to explain but I felt betrayed because I gave him another chance, I was loyal to him and gave him all my love and I took care of him. I literally did everything for him‐ I cooked and cleaned after him, I spent all my money on him, I helped him with his exams in college, I stood up for him against my family and friends. I don't know what happened, maybe I snapped but I made up my mind to ruin his wedding. I sent the bride an email asking her to give me a call. She called me and I told her everything, from day one to the last day. She hung up the call and I thought she hung up on me because she didn't believe me. But she called me the day before the wedding and told me that she believes me and that she's not going to marry him. I was surprised and felt very guilty and I told her to not do anything and that I made a mistake. She said no and told me that she's not going to marry him. The next day I got a call from him‐literally 1 hour before the wedding‐and he was crying and begging me to talk to her because she left him and she's not answering his calls and he doesn't know why. And that the wedding is cancelled. He was begging me to forgive him and I did. I felt very bad for what happened and I told him that I forgive him and I'm sorry for what happened. He didn't talk to me again after that‐literally‐ he changed his number and moved to another city. I was feeling so guilty for what happened for 4 years‐ I couldn't celebrate my birthday or any occasion without remembering what I did. But 4 months ago I got a message from him on Facebook and told me that he got divorced after 2 years of marriage because his ex found out that he cheated on her. And he told me that he never really wanted to marry her and he was still in love with me that's why he never let her go and didn't want to divorce her even though he was cheating on her. That he got depressed after our breakup and he didn't care about what was happening around him and he was just going through the emotions. Now‐I don't know how I feel. I don't know if I should feel good because what goes around comes around is or feel bad for what happened.<br><br>EDIT:<br><br>OMG, I didn't expect this blow up and I'm so sorry for not responding to the comments earlier. My ex broke up with me at the end of 2014 and we got back together in 2015. We broke up again in 2016 and got back together again in 2017 for a month and broke up again. We got back together in 2018 and broke up again in 2019. We got back together in 2020 for a month and broke up again. He stole a huge amount of money from me and my family and we called the police and he was arrested and spent 2 months in jail. After he got out and he called me to ask for forgiveness and I refused to talk to him. <br>He came to my workplace and stabbed me with a kitchen knife and I was hospitalized for a month. He spent 5 months in jail and he got bail. He came to my house and tried to strangle me but my neighbors heard my scream and they came and saved me. He was arrested for a year and he was released last year. I changed my number and my job and I moved to another city. But I'm still traumatized and every time I see a knife or any sharp object I remember that day.