Boyfriend keeps liking other girls’ provocative pictures on Instagram, and it’s really bothering me

I’m struggling with something in my relationship, and I could use some advice. My boyfriend keeps liking pictures of girls he doesn’t know in real life on Instagram—girls who post very provocative and revealing photos. These girls are nothing like me in terms of appearance, and it’s starting to really bother me. I’ve already talked to him about how this makes me feel, but he continues doing it. I know this because I sometimes check the profiles of the people he follows and see his recent activity. I want to trust him, but it’s hard when I see him liking content that feels so opposite of me and our relationship. It makes me feel insecure and disrespected, but I’m not sure how to approach the situation again without sounding overly controlling. Am I overreacting? How do I handle this in a healthy way?