I fully understand you. I don’t think it’s wrong to get pissed off, I know I would be upset and kinda pissed off too, even if he didn’t know them personally. Does he know that you’re upset about it? Maybe you should tell him. He might stop and possibly even change it to a photo of you both! I’d talk to him about it first, just see what he says. I’m sorry that it’s not the greatest advice, but I hope it helps!