Why is it so hard for me to get over my ex even though he treat me like crap and dont take care of his kids?

It was a long 10 year relationship which ended in a disaster. I was incarcerated for an act him claimed I committed but was acquitted and so was he. He states all the time that he really love his kids but wont' even allow them to meet his side of the family. There was plenty of lies that he told his mom and she believed him. I couldn't no longer handle living in a situation that endangered my children and I with the type of work that he does. I had to get away from all the pain he caused as well. So why is it that it's been a year and I am still thinking about him constantly; every day? It's scarry, because he has gone on with his life while he was with me. Yes he cheated many times as well. Please someone help me to do other things instead of thinking about a man that doesn't love me. Sometimes I think that he never loved me; I think the relationship was more of a convenience to him. The kids are involved and has never meet their side of the family and it hurts really bad. What I have been doing is completing my education (which he told me I didn't deserve my degree), making blankets crocheting, keeping busy with the kids; in school and out, attending church, praying, and using the time I use to spend with him to pamper myself. Please someone tell me what am I doing wrong? One thing I don't want is to be back with him after all the hurt and pain but I still actually care for him; Love him. I am even trying to relocate to another town because where we are it reminds me constantly of to much pain. Any suggestions?