A feast for the eyes!

Please help me on this one iam happily married for 6 years before I met my husband i had a boyfriend that I loved so much we were together for 3years. We had a bad break up. There was not a day I didn't miss him but I learned to live without him.Well I still think about him to this day. my husband is the best husband ever and an excellent father, the thing is he is not him. He doesn't have all my heart and even though I care for him I can truly say he is not the love of my life i thought i loved him but i keep thinking of my ex i hate myself for always thinking on my ex when I have an excellent husband at home.I know I will never be with my ex ever again, but I could never fully get him out of my mind. When I met my husband he was nice and a very attentive man. I agree to marry him I knew I wasn't totally inlove with him but I decided to think with my head and not with my heart. I thought about what my life would be like if I stayed with my ex. I loved my ex so much but he tried to control my every actions.I don't think I ever got over my ex and even though I married to the most wonderful person in the world I feel I'm cheating on him because my thoughts have always been on my ex. I will not leave my husband but I can't stop thinking of him.Oh and to make matters even more complicated I'm pregnant with baby #2 my husbands child.I need your thoughts about my situation i need to get over my ex i love my family iam happy i have all that every woman could possibly dream of but i think of my ex how to get over him?

Any remedy,suggestion or opinion?!