How to get over wanting to be with my Ex.

My ex and I broke up after almost 2 years, about 2 months ago. The breakup was sad, with both of us upset and distressed over the emotions. We just couldn’t seem to provide what we needed to each other. My issue is I still think about him everyday, and especially in a physical way. How can I simultaneously heal, be single and spend time by myself but still want him, even after he broke up with me. Part of me wants to wait for him in case we get back together, but I also that’s not healthy. The people around me keep saying time, but it seems my thoughts get stronger the longer we are no contact.