genuinely would suggest you start meditating. stepping outside yourself can be profoundly impactful. seeing the feelings you are having, and just acknowledging that those feelings exist and giving them a name minimizes their importance. "that was fear, that was emptiness, that was resentment, that was joy." it can be grounding to realize that your emotions and thoughts are technically just suggestions dropping out of a stochastic pattern matcher.

im not going to explain the entirety of meditatiob, but i would suggest you go to a local buddhist temple and ask for suggested reading material on how to get started.