I'm not sure how being poly and how you stay friends with exes or not has anything to do with each subject. I mainly haven't kept in contact with a lot of exes, because they were just bad choices in life so far. There is perhaps one, maybe two I am still friends with, thuogh even then, we don't really talk. There have been ones i've tried to stay friends with afterwards too, but THEY didn't want to. But it's no real loss. People come and go from my life often. Even my longest and closest friend has only been around since the beginning of high school. People change and others, you just get to know better.
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