My father taught me to be nice first because you can always be mean later. But once you've been mean to someone, they won't believe the nice anymore. So, be nice; be nice until it's time to stop being nice, then destroy them.
Be proactive with your symptoms: be picky about the company you keep. "I'm very picky with whom I give my energy to. I prefer to reserve my time, intensity, and spirit exclusively to those who reflect sincerity.