How to deal with break up. Loving him.

I have been in a relationship for almost 10 yrs and we were planning to get married. But the guy cheated on me with another woman and broke my heart. I am not able to digest this fact that my childhood Frnd and boyfriend since 10 yrs did this to me. It came as a sudden shock for me. I am not able to believe on what happened. Moreover I am not feeling angry towards him. I am still hoping he will realise and come back to me which is wrong for me and I know this. But I can't get out of this feeling. I still love him. I want to get rid of any kind of Feelings towards him. Please help. It hurts a lot. He had promised me 3 months back that we will be getting married soon. And suddenly this came up. M devastated. I am a single child and I don't want to hurt my parents because of what happened to me. Please suggest how to forget him or fade the memories or stop loving him.