My boyfriend continues liking other girls pictures on instagram?

I told my boyfriend I don't like it when he likes pictures of half naked girls on Instagram (girls he knows) and for a while he stopped because he knows how upset it makes me and he agrees it's inappropriate , now I see he started liking pictures again and but when I confronted him he said that I'm meddling with nonsense. Now it's not bothered by me being upset about it.
My boyfriend continues liking other girls pictures on instagram?
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