AITA because I didn't open my "ring box" during my proposal?

Hello! So I want to preface by saying I have been with my boyfriend for almost 7 years now, and I know that he is the one I want to spend the rest of my life with. I'm not concerned if he's the one or not, and I'm generally happy with our relationship.<br>The issue started because I've been pretty vocal about NOT wanting to get married. Both of my parents had pretty nasty, long, and expensive divorces, so I really don't want to ever get married. That being said, I have said that I would consider it if it was just a courthouse thing and no "fancy" stuff. I've also told my boyfriend multiple times that he doesn't have to get me a ring, and I would honestly rather not waste money on a ring. We've had plenty of talks about how my "dream ring" would be a simple band or if I could get a totally different piece of jewelry like a necklace or a pair of earrings. I don't want to waste his money on something I'll never wear.<br><br>Christmas time rolled around. We decided that we would stay with his family this year. We were sitting in the living room, and he started talking about how he wanted to spend the rest of his life with me in front of his whole family. At this point, I knew what he was doing, so I started to cry. He got down on one knee, opened his ring box, and showed me a beautiful solitaire diamond ring. I started crying harder and eventually said that I wanted to spend the rest of my life with him too and that yes, I would marry him. We hugged and kissed and he put the ring on my finger. The rest of the night went great. His family loved the ring, and I did too. I was so touched that he had done this and I was very excited to marry him.<br><br>That night he and I sat down and talked for a while. I eventually asked to see the ring again, and he said of course. He handed me the ring box and I opened it and saw that there was no ring in it. I was confused, so I asked him what was going on. He said that he didn't buy the actual ring and that he was just using a fake ring because he "didn't want to waste money on something that I may not like". <br><br>The next morning I went to tell his mom the good news, and she was so excited to see my ring. When she noticed that I didn't have it on, I told her that it was in my purse. I went to get it and she noticed that it wasn't the same ring that he proposed with. I eventually told her what he told me, and she was appalled. She asked me why I didn't say anything, and I told her I didn't want to ruin the moment for him. She asked if I could show her the ring box, and when I showed her she flipped out. Inside the box there are the words "diamond solitaire halo ring" scribbled in pencil. She asked me why he couldn't even be bothered to put a fake ring in the box, and I said I had no idea. We didn't talk about it much more, but she could tell I was upset. <br><br>We got back home and two of my friends wanted to see my ring, and they had a similar reaction. I kind of brushed it off and said it was okay because we could always get me a "real" ring later. They asked me why he couldn't have put the fake ring in the box as well, and I told them I had no idea. At this point I was starting to feel like an asshole for not saying anything.<br><br>I eventually told my boyfriend about my friends' reactions and he got mad at me. He said that I was making him out to be a bad person and that I should just be grateful for the proposal. I told him I was grateful, but that it would be nice if he could just put a ring in the box. He got mad and eventually said that he was going to go out and buy me a ring because clearly that's what I wanted. I told him no because that would waste money and I didn't want him to feel like he had to do that. He went out and bought a ring anyway. It's a nice ring and all, but I told him I was mad that he didn't just put a ring in the box. <br><br>Now we're fighting and I just want to know if I'm the asshole for making him feel bad about the proposal. Was I overreacting?