The moon ummm!! I think being in love is literally any piece of information about a person and feeling your heart reach out to them in response. It doesn't have to be a big thing like a tragic past or their aspirations for the future; sometimes you find out their favorite kind of sandwich and the fireworks in your brain go off. Sometimes it's a quick memory from grade school they tell you in passing. Maybe they relay a memory of a pet they once had. You'll know you're in love when the little things make your insides light up like an 90s arcade