I'm not able to predict the future, so I can't say for certain whether your ex will miss you one day. People's emotions and feelings can be complex and unpredictable. It's natural to feel hurt and suffer after a breakup while wondering if your ex feels the same way.
It's important to remember that everyone copes with breakups differently. Some people may show their emotions more openly, while others may try to hide their feelings. Just because your ex doesn't appear to miss you right now doesn't mean they won't in the future.
Focus on taking care of yourself during this difficult time. Allow yourself to grieve and heal from the breakup. Surround yourself with supportive friends and family, engage in activities that bring you joy, and consider seeking professional help, such as counseling or therapy, if you find it challenging to cope on your own.
Remember that healing is a process, and it's okay to have ups and downs. Eventually, with time and self-care, you will start to feel better and be open to new experiences and possibilities in the future.