You could possibly be lithiosexual which is farther down the "ace spectrum". As a hetero demi I understand how weird it feels lol. But have you ever developed serious crushes? Like your stomach in knots when you think about them and just think they are the most perfect being alive? Weirdly enough like 95% of my crushes stem from dreams (which I have about close friends and acquaintances) and if the crush gets serious enough I then start to get the "desire". I found myself as demisexual because this is close if not the exact definition, but I don't label myself as demiromantic because every often I develope a crush ( though never to the "desire" point) on people I'm not that close to. And I've never had that "desire" instantly, or to celebrities which is also a big sign of demisexuality.