🧝🏽‍♀️ Photos of his ex on his phone 🧝🏽‍♀️

Alright so my bf and I are super trusting of each other and all that but I was going through his phone (he was okay with it) and found all these pictures of him with his ex which I didn’t care about it but now all my friends are saying it’s really not okay that he still has all his old couple-y photos with her. What are you guys’ thoughts cause honestly idk what to think and I’m genuinely curious on what others would do. I don’t wanna be a psycho but is it worth bringing up w/ him? I was a little like taken back but idk what to think.