My boyfriend got super angry and turned it around on me when I confronted him (read details please)?

I didn’t even really “confront” him. I just got a DM from a woman on instagram, telling me how my boyfriend has been talking to and flirting with a girl she knows etc (my boyfriend is a public figure). I didn’t even respond to her, I just took a screenshot and sent it straight to my boyfriend saying “look what some girl is telling me, why is she sending me this?” and sent a picture of the account that sent me it and asked if he knew that person. I called and was very calm, and didn’t accuse or attack him in any way. If anything I was on his side, saying “if you don’t know this person i’ll just block her” and saying “oh maybe that’s someone that’s in love with you and is jealous”. He said he doesn’t understand why she’s saying that and finds it weird, he does know the girl she’s talking about but says that’s just a friend so he doesn’t know why the person would say that he’s flirting with her. Then out of nowhere he started getting super angry, telling me things I did months ago that he was dissapointed about and started shouting and telling me that I shouldn’t send him “nonsense” like that, that I should trust him and if I did i wouldn’t send him a screenshot of that asking him about it. Then started getting angry about me “posting a picture of us when I know he doesn’t like that”. He said i’m too insecure, that I have problems with myself and that I should work on myself.. Told me it’s my fault because I shouldn’t have posted that picture of us that’s why people send me things like that. And that he wants me to delete my instagram because my instagram will ruin our relationship, and told me to choose between either my instagram or him.. I felt I didn’t do anything wrong and I actually feel really bad about myself now and guilty
My boyfriend got super angry and turned it around on me when I confronted him (read details please)?
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