Ladies, I desperately need your advice on how to deal with this? ?

I don't know why i'm feeling this way. This man treated me horribly. I thought he was the love of my life. He was my first love, lost my virginity to him. We made plans to get married. The relationship was going well when out of no where this man stopped calling me, ignored me, lied to me and disappeared. The break up was tough to me. I never felt so bad and so miserable. Now, 3 years later, I had thought I was over him, but apparently i'm not. I recently found out he was getting married to someone I went to HS with. I'm feeling sad and overwhelmed with all kinds of feelings. I know deep down inside this man was not the man for me yet. What he did to me is unacceptable and I deserve something better than that. What can I do to stop this painful feelings and just get over this scumbag? Please help. I appreciate your feedback. Thank You!