What can I do to not care who my boyfriend follows on instagram?

Hey everyone, I have been arguing with my boyfriend about him following bikini girls on instagram for a real long time and i’m so tired of being insecure about it. We are not happy because of it and I just don’t want to care who he follows. He is not liking any pictures, he is not flirting with them. i just not want to care anymore. any advice?
What can I do to not care who my boyfriend follows on instagram?
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