His ex

My boyfriend still has photos of his ex on his Instagram some of them I understand it's her and friends at a party, but he still has photos of her as his wcw. These are from years ago, and they don't talk anymore. But he only has like 20 posts so it's not like it's something he never sees. I want to ask him about it but it's not worth the fight. So am I just being extra and shouldn't worry about it, it just gets bothersome because my friends always ask about it and I'm just like um.