You want him. You love him. He’s broken but you can fix him. You know you’re everything he needs. Not that you actually know that much about him. He’s there and then gone like a beautiful idea or taste. And every time you see him, you want him even more. He is your obsession.
The difference between obsession and the first stage of what could be love is reciprocity. Does he return your infatuation? Or are you doing most or all of the work while projecting your hopes, dreams and needs onto this “blank screen”? If you really don’t know him and he stays a mystery, he can be whatever you need him to be. He can be perfect.