> bullies don't leave you alone because you're awesome, they leave you alone because their bullying doesn't work on you (because you're resilient to personal attacks, or you pretend to not care until they exhaust the possibilities and leave you alone etc.) or backfires on them somehow.
I can tell from experience that this is not how it works. Real bullies never leave you alone until you stand up and fight back. It's the amount of energy it takes for them to bully, not the amount of damage they do.
They don't care how resilient you are or whether you care about the bullying or not, when their bullying doesn't have any bad consequences or the potential for bad consequences. Only if you make it hard for bullies to bully it stops.