I don’t know what to do😔

My boyfriend follows numerous accounts that are VERY sexual and it bugs me. It of course makes me feel insecure (because these girls look amazing) and I find it really off-putting. We follow a few of the same Instagram accounts and Instagram tells you if one of your friends like that post. Every once in a while they post a sexual post. I get this sad feeling when I see that he has liked a sexual post. I have been with other partners and I have never had this issue, so I'm not sure whether I should be feeling this or not? I have tried to ignore it, but I don't feel like I can because of how it makes me feel... I have talked to him about it a few times about how it makes me feel but he carries on following them... I told him it’s ok to have a couple because I know if I said he can’t have any he would think I was too controlling and it would make him not want me anymore. It makes me feel so insecure and I know I shouldn’t let it get to me, but it does and I have tried deleting Instagram but I have to have it for my photography. This all really started developing when he said he had a crush on a TikToker then showed me a video of her.