Sadism

Some people are special in your life. Hardcore special. That more you get closer to them, more you fear losing them. Your mind rushes to find a little glitch in a perfect situation. A small moment to feed insecurities overshadowing your brain. Negative thoughts and peer pressure pop up to ruin little moments of happiness. Sadness of good byes dominate beauty of togatherness. Why is it so convenient to fall prey to sadism? Is it our intrinsic nature or sorroundings shaping us that make us so prone to negative emotions? Why is it so hard to shed overwhelming feeling?