won't get pictures

So my boyfriend like hates getting pictures taken. We barely have any of us maybe a handful through the 3 1/2 years we've been together. Well we're expecting our first child, and I told him we're getting maternity pictures done. And he said that's fine if you do it. I said you're doing it with me and he said No. I said yes or I'm going to be extremely upset with you and he's just like that's fine... and I just didn't say anything. Idk what to do. I really wanted to get them done and it really hurts my feelings he won't take only a few with me when this is our first child and it's important to me. It's something we're going to experience once and I'd just like to have the memories of it. Especially because he is super happy and excited about it. I just don't know what to do and maybe I'm over reacting but I'm really upset about it.