Depending on the level of toxicity in a relationship, sometimes you have no choice but to go "no contact". You have to not only leave the space, but also make sure that you remove all access to yourself by those who contributed to the negativity that warped your mind, your soul, and altered your way of seeing the world. You can't take anything with you from that space if you want to create something healthy for yourself. You shouldn't bring darkness into your new light.
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Thank you for this clear, compassionate analysis. You expressed it better than I ever could.