This hormones are going to be the death of me. I do not want to be with my ex, I am over him but he…

This hormones are going to be the death of me. I do not want to be with my ex, I am over him but he was my first love so I'll always have a love for him but we are not meant to be together. That being said i don't understand why I can't stop thinking about him....I think about the past and think about how his life is now. I'm so over it....😒😒😒