Why does my boyfriend keeps his exes on insta and FB as friends. Even if he doesn’t talk to them (as he says)?

I’m shy and can’t ask this to him straight forward , was just hinting these by sarcastic jokes. But he gets offended all the time telling that I hurt his feelings and making him feel guilty even if he didn’t do anything wrong. I felt bad after he saying that. Is this a manipulation?

Why does my boyfriend keeps his exes on insta and FB as friends. Even if he doesn’t talk to them (as he says)?
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