Boyfriend and IG?

So I notice my boyfriend likes pretty much ONLY girls' bikini pics on instagram. Its not even models or anything, they are people who went to his old hs and such.

This makes me extremely uncomfortable and sh**ty tbh. Like I dont feel good enough and it hurts hes publicly giving them attention through likes, ONLY on bikini pictures.

I dont know what to do, I dont want to bring it up and sound psycho, but it kills me and a part of me doesnt want to be w someone like that. Like if i tell him to stop, he still had those intentions.