Does he have a reason to be mean to me?

So, earlier today my boyfriend got bored and decided to look through my old email that is linked to his iPhone, and he found a 2 year old email from some guy I used to talk to with some reeeeally old nude photos from when I was 16 that for some reason the guy sent back to me. Don’t really know why he sent them to me years later but I guess I never deleted the email. Well, my boyfriend saw it and he instantly knew they were old because I’ve literally gained like 100 lbs since then. He’s been really shitty with me all day. I cooked a big dinner for him and everything and he still is just being really cold and short with me.

Guys, do you think he’s being a little too much? I mean I totally understand how that would bother him a bit but he’s acting like I cheated on him or something. ??? This email was sent to me before we got together AND the photos were years old!

Would like some advice and opinions, thank you 🖤