Whenever someone does wrong to you, like cheating, disobeying or breaking the trust or anything else. You need to think of the revenge or do something wrong to them. You just wait and let karma hit them. This will define your good Sanskaras and karma. No need to earn hatred from anyone. Whatever goes around comes around and you need not to take tension about that. The person who did
wrong will definitely get the answer from your side. Karma will be your messenger.
So you just relax and don’t get pissed off. Let Karma play its cards. Here are few quotes on Karma that will help you to take a chill pill.