I am so sorry you are having such a rough time at the moment. I know what you are going through - my parents split up when I was 12, and I had to choose which one I wanted to live with, and for a while it was just my Dad and me. They actually got back together, and next week is their 40th Wedding Anniversary, so don't give up hope.
MOST IMPORTANT you must look after yourself, and remember we are here for you if you want advice or just need to vent.
HUGS
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