this girl knew i had a girlfriend. she saw me approaching other girls in the street. she came home anyway.
preselection is not a theory. it's one of the most powerful things working in your favor or against you depending on how your life looks.
when a girl sees that other girls want you, she doesn't think "he's taken." she thinks "what do they know that i don’t?”
you don't need to announce it. just make sure it's visible.