Asked him to delete her

I asked my bf to delete this girl off social media cause him having her makes me uncomfortable he likes most of her stuff on Twitter and he had texted her once and deleted the messages innocent ones but still deleted them so I got upset. I asked him to remove her and he got mad and said he was just gonna delete his social media? It’s the first time I’ve ever asked for him to remove someone in the 1 year we’ve been together.... idk what to do.