A year and a half later of seeing my ex I still think of her constantly. I've been with many women after her but love her. What should I do?

I would ask ur ex what feelings she has for u, if she has the same feelings then y'all try to take it slow and easy on getting back together. But she may have been trying to move on and is with someone else and it's best to let her go. It's hard cuz I'm going through what u r going through cuz my ex bf and I have feelings for each other still but he moved on and I'm trying the best I can to move on as well but it will take time. I wish I had someone I can move on with.