If petty and meddlesome people stress you out try to begin looking at their slights, insults and jabs as a form of training. Being insulted offers you an opportunity to practice having a non-response internally by remaining calm. It's a practice and it takes time, but it is very possible to learn this skill. Start with small slights and attacks and when they occur — steady yourself by setting the intention and by saying to yourself, "Alright. This person is giving me an opportunity to practice having a non-response internally." Just the context of this practice as an opportunity will begin to help. Then continue practicing with each incident while exploring yourself and trying to better understand your feelings. Through this private intention you will begin to see ugly and coarse behaviours in others as helpful, and the practice can even become empowering instead of dreadful. The deeper you move into this practice the more you will begin to realize that the terrible feelings you once believed were caused by others originate from you and truly belong to you. Fear, anger, nervousness, dread and that awful fight-or-flight feeling will all slowly be replaced with calm, confidence, coolness, and eventually compassion.
— Bryant McGill
post "When faced with conflict, try to keep the surface of your inner-pool of emotions calm and steady"