Normalize paying attention to how your body feels before, during, and after interacting with someone and adjust accordingly. Fight-or-flight response usually means avoiding them. Walking on eggshells usually means walking away. Feeling drained usually means keeping your distance.
Emotional awareness is knowing that when your energy levels are down, you should not trust the way you perceive yourself, or the world, in that moment. Step back and retreat into your place of fortitude. Return cleansed with fresh, clear lens.