Is it disrespectful for my boyfriend to be liking another girls 'sexy' pictures in her bikini but he won't like any pictures I post like that?

He keeps liking this girls pictures of her bum in a bikini and in her underwear and she lives in the same city as us and I've asked him about it. I told him I dont mind him liking normal pictures of other girls but it bothers me when he likes ones of girls in their underwear or showing off their bums and stuff. And when I went on holiday he didn't like any of my pictures in a bikini and they were just normal ones I wasn't showing off my bum or anything because I thought that would be disrespectful to him you get me? And even though I've told him before it bothers me he still continues to ignore me and do it anyway. Am I overreacting? I know this bothers a lot of other girls aswell, it's not just me. And I've cried and everything about it because he won't listen and he doesn't care.
Is it disrespectful for my boyfriend to be liking another girls 'sexy' pictures in her bikini but he won't like any pictures I post like that?
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