Boyfriend still keep stuffs from his ex

Hi guys

As the title stated I have a concern, maybe it is just me who thinks this way but I would like to hear opinion from others. My boyfriend who broke up with his ex still has stuff like a picture from her (alone her) or given cards and stuff, things on his pc with her name on it from his ex. It been quite a while when they broke up but I was wondering even though he kept telling me how much he loves me whether I should be concerned because I keep overthinking quite a lot about this. He told me that he has no feelings for her. He used to talk with his ex and didn't stop until I mentioned it to him. And then he cut of contact with her but he do has stuffs with her name or picture on it, I am upset about it but he doesn't know why I am upset. The thing is that I felt really disappointed that I have to mention why I am uncomfortable with him talking to his ex and why he didnt take action by his self. That's why I don't want to mention why the stuff he kept from his ex or with his ex in it upset me, because once I do that it doesn't make me relieved but I will really be disappointed why he won't think that by himself why that is "wrong" maybe I am now being "toxic" by not telling but I can't tell him because of the reason I mentioned before really affects me. I don't know whether I am exaggerating about this situation or not.

I know he loves me, but I have anxiety and I overthink a lot and this is really making me feeling so miserable, and I have a hard time to tell him this as well

Any advice? Because he does keep telling me how much I love him so I don't know whether I can confront him with this.