If you want to check in with him and ask if he wants to give it another go, you could. I think it’s unlikely, but unlikelier things have happened.

Generally though, I think you should take the things you learned from this relationship and apply them for the next time. Maybe you think of him and miss him because you just haven’t found anyone else yet. Have you got friends and activities in your life to keep you busy, and meet new people? Maybe that could help.

My best wishes to you.