In intermediate school we were playing chess and I performed an “en passant” (Capture in passing) move and he seriously opposed this move. After school on the walk home he became physical. We never spoke again.
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How petty your best friend was.
It takes time to have a best friend and a lot of trust try spending time with your friends and see if you can find out who is your closest maybe a day at a fair or a shopping trip if that’s what you like or just a night at the pub/bar/tavern