is this a red flag

I’m 24 and my bf is 27 and he keeps saying “we’re getting old”. and it’s bothering me like I’m only in my mid 20s and you’re already calling us old, what is he going to say when I’m 30? What will he say when I’m 40, 50 etc if we last that long? he’s going to think I’m a grandma by the time I’m 40. Is this a red flag or should I just ignore it because it’s society making everyone think they’re old the second they turn 30

Edit- red flag might be the wrong word but I don’t want to date someone that thinks I’m old by the time I’m 30 if that makes sense, let alone someone that thinks I’m getting old at 24 when I’m literally young lol. But I think it’s definitely that he’s insecure that he’s almost 30