I miss my ex and I know I need to move on because he doesn't love me anymore but I can't. How do I stop missing him?

I understand it is difficult for your to move on. Have you tried using coping mechanisms? Coping mechanisms such as deep breathing, journaling, exercising tend to work for individuals. It is important to see what will work for you and get to know what you enjoy and try it out. These activities will help to clear your mind and perhaps take your mind off of your ex. I know it can be difficult. Doing activities you enjoy can be very helpful. How about friends? Do you have friends you are close with? Hanging out with them can also he helpful.