I saw my dad doing something awful... TW

Its been 2 months since my mom walked out on me, my dad, and my younger brother. She was having an affair with a man from London... She got pregnant and decided to leave us all behind to go to London with him and start a new life. I have a 5 year old brother... My dad has been so depressed... I went to ask him a question and walked in on my dad self harming... He was cutting himself... He threw his jacket on and pushed me out of the room... I'm what to do... My dad won't even look at me.

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