What does it mean for my boyfriend to like photos of girls that look nothing like me?

Anonymous
My boyfriend and i have been together for about a year, he currently doesn't like women's half naked photos or follow them because it makes me uncomfortable but it's hard for me not to think about when he did a few months back.

For context I struggle with body dysmorphia and have had a very hard time with my self image for many years due to trauma that has caused me to have som trust issues with it, and he's known this since before we started dating. I know it isn't good for anybody to deal with, I'm working on it.

I am a chubbier girl, 5'5 175lbs, and he would always like posts of thin girls with big butts (I'm not exactly blessed in that area), but he says he just likes chubbier girls and that he loves my body how it is. But he can't give an explanation as to why he would always watch and lust after girls who we're totally opposite. Even though he doesn't do it anymore it's hard for me not to think about and cause me to get down on myself.

I just want to know what it could mean why he did it and just like, what I should do or something.
What does it mean for my boyfriend to like photos of girls that look nothing like me?
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