It's quite possible that he now realises how much you cared for him, and possibly, he for you. So maybe you don't need to confront him and just let things be. Or if you do decide to tell him, are you prepared for a negative reaction? A denial of any feelings on his part, or a downplaying of your own feelings for him? Sometimes we can romantacise situations unrealistically.
I enjoyed reading your post. Nothing like a lost love remembered.