Trying to get over my Ex

We were together for 3 years and did everything together. I understood why we needed to break up (co-dependency, arguments, and anxieties about each other) but I can’t help but miss them so much. It’s hard to do anything now without thinking of them constantly. I still love them so much and can’t stop holding out hope that we can work things out but I know that both of us need to focus on ourselves. It’s really fresh but I get so anxious thinking I will never get over them.