That you gave someone your best and they rubbed it in your face doesn’t mean that narration will be your life story. It doesn’t also mean that person would not find another person who would give him/her their best. Rather than focus on the negative side of Karma, why not focus on the positives it will bring your way if you see the right actions. As supposed wishing whoever hurts you a bad Karma why not bask in the good that you have done, knowing it will come to you bigger and better. Rest in the good you have done. Let it heal your heart cause knowing the earth will revolve and Karma will serve you what you give should reassure you. Want to know more, listen.