This is going to upset a lot of you mamalettes but please give me some advice to help me.

Last year I ended my relationship with a married man. He works in my office and we started seeing each other and I fell in love with him. I know some of you will automatically think I am a bad person. I have no excuses because I know what I did was wrong. I was going through a difficult period in my life time and this man was there to help me. We dated for 3 years and during this time he promised that he will end his marriage he decided not to. He wanted to still keep up appearances with the outside world that everything was fine and have me on the side. I became depressed because he had promised me that he loved me and that he will end his marriage because his wife was a horrible woman. He begged me to continue to be his girlfriend. I begged him to choose me. But when I saw he wasn't going to leave here, I told him I couldn't continue anymore. It was too hard on my heart. I felt used and betrayed by him. I asked him again to pick and to do the right thing because he said he didn't love her and he saw a future with me. After 3 years I was very upset. Right now I have become born again and i feel regret and shame because of my relationship with him and what i later did to his wife. After we broke up I was very angry so I told his wife. I had saved her number a long time ago. So I called her and told her about how for 3 years I had been making her husband happy. At the time i was angry but i know that i cause an innocent women and her children pain. Now i feel like I need to apologize to her. After i told her, he never spoke to me again but I still used to see him at work. My colleagues did not know about our relationship so i had no fear about him not talking to me. I am in pain for what i did to his wife, even thought he told me he was in an unhappy marriage and she was not always nice to me, after i spoke to her i knew she was a nice woman. So he may have been telling me lies. I was to be at peace with myself so i am thinking of calling her again to apologise. Is this a good idea?