advice please

i’m in need of advice, last night i was looking at my boyfriends instagram and when to search for someone i noticed his for you page had a lot girls in swimsuits and workout clothes. super models with big boobs and instantly just felt hurt by the fact that is what he chooses to look at. based on other social media platforms i looked at i know he doesn’t do it anywhere else and i trust him. i just can’t help but feel hurt by it. i guess im unsure of how to bring it up. i know i should have said something in the moment but at the time i was unsure of how i felt.