Should he cut ties with the other chick or not?

My boyfriend of 8 years still hangs out with the chick he was cheating on me with. I told him in order for me to get over the betrayal he should stop all contact with her but he won't. I explained how disrespected I felt by that and he only sees it his way and thinks it's my excuse to controll who he is friends with and not how the situation is emotionally affecting me.
Should he cut ties with the other chick or not?
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