Dating but I miss my ex?!!?

About a month ago my boyfriend broke up with me. I was devastated I loved him sooooo much. But I realized I needed to move on. A week ago I started dating this new guy. I wish he could be as cute as my ex. And as popular funny ect. I really miss my ex! I see him all the time in the halls and idk what to do. I still really like him, but he hates me. How do I get over him?!