Boyfriend liking pics

I don’t mind him liking innocent pics on Instagram but when it comes to girls in their bikinis or showing off their ass and titties of course it’s going to bother me!! I’m mad at my boyfriend I feel disrespected and idk how to tell him I feel like I’m bottling it up inside and at the same time I’m feeling really disappointed I’m starting to doubt wether or not he’s being faithful and stuff am I wrong?

Edit: they’re literally pics of their titties hanging out am I still overreacting? Lol