You don't set the rules for everyone.
" that not-yes is always, always no. No question."
Taking your pants off and smiling between your knees isn't a "no" just because he didn’t explicitly ask and you did not actually say "no".
I lot of women don't want to play by your rules.
The boy you manipulated is blameless. From the sounds of it, he actually liked you and probably was emotionally hurt by your subsequent rejection.
Too bad he wasn't materially better off. Maybe then you would have been more up for it.