My ex-boyfriend cheated on me and now he wants to be friends?

my ex-boyfriend cheated on me he texted me after a few days and said he wants to be friends and that he needs me next thing I know he starts yelling getting mad and calling me a slut. I was walking in the mall one day and he just glared at me I haven't talked to him in weeks and then he finally texted me today and wanted to be friends again. I told him no because he only freaks out each time and I'm over him and he has a girlfriend but he keeps begging me to be friends why?

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