What you send out will eventually return to you. Being hurt is apart of the souls journey. We are all meant to evolve, and sometimes it is pain that must teach us the lessons we need to further enlighten ourselves. With every negative thought and emotion you direct toward them, it's already sending ill will their way. The fact your asking for a negative spell/ritual should already show you're uneducated when it comes to dealing with spells, and negative/dark ones you should REALLY stay away from. I mean no disrespect, and only speak the truth. I wish the best of luck getting over your grudge.