Its not that you hated your BFF or wanted them to suffer - but your best friend's sister was so cute and well so was his GF - could you really pass up the chance with both of them? Maybe your best friend will never even know you used their sister and GF
When my bully figured out who my crush was, he forced me to set up a date with her, or he'd make my life a living hell. I don't know if this is better....