Should I be hurt by this comment?! Wtf

So to begin my bf is 20 and I am 18, I was on Instagram and saw that my boyfriend liked this picture of a girls ass, like straight up thong shot of just her butt posted on her ig because she’s a fit Instagram girl... it was on my explore page. But it’s different because she went to his high school and he saw her in person. Even before we started dating he was scrolling his feed once and mentioned she was hot to me. I put it together it was the same girl and I saw he liked alllll her sexual “fit” pics since like forever. I asked him about it, and he knows how insecure I am about my body..., anyway I asked him if he thought I was prettier than her and he basically said no, he told me in these exact words “you need to understand that people in this world are better looking than you” I was so hurt... I lied to my boss about being sick because I couldn’t stop crying. like obviously it’s true I’m not a celebrity, but as my boyfriend he should make me feel like the most beautiful person to him. We’ve been together 6 months and I asked him to unfollow because it made me upset that he thought better of her than me and he threw a fit about unfollowing her..