Hey there. I suggest you to look into dysfunctional family systems. Look into attachment styles. Look into parenting styles. Look into emotional abuse. People with DP very often have dysfunctional parents. Shaming parents that pass down their own shame, conscious or unconscious. Overcritical, rejecting parents. Your dad rejecting your true self and your core emotions is straight emotional abuse. Look up all those terms and tell me what you think. I don't want to make it sound like your dad or your parents are bad in itself, lots of those things happen unconsciously. Just some things you should look into and be honest if they ring somehow true.
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