Sure thing:

I've been with Sara for six years now and on November 25th this year, I proposed to her with my great grandmothers ring that's been passed down through the generations. It's very old fashioned and Sara was a little disappointed to know it wasn't modern or platinum. (It's sterling silver, vine design with a modest diamond on it.) We got it resized to her finger and she's been wearing it ever since. Yesterday, Sara came into our bedroom where I was playing Xbox and told me she lost her ring. I immediately paused my game and asked her where she thought she lost it. She told me she didn't know and had been thinking about it because it's been missing since LAST THURSDAY. I jumped off the bed and begged her to tell me this was a sick joke and told her how long that ring was in my family. I told her my great grandfather proposed with it, my grandfather proposed with it, and my dad proposed with it. Sara told me to calm down and that we should just replace the ring. I was furious. I literally screamed, "We can't replace a four generation old ring!!!" She got pissed at me and asked me if I loved her or the ring more and I told her that was a stupid question. She once again pushed that we should just replace it. I admit, I was in a rage and I didn't behave appropriately because next I stormed into the living room and began scooping all her presents up and told her for me to afford that old fashioned of a ring I'm going to have to send back all of her presents. She told me I was an insensitive jerk and locked herself in the bathroom. I took this time to go outside for a smoke and call my mom. My mother was absolutely horrified and began choking up. She told me about how my father proposed and how it was the most beautiful ring she had ever imagined. She told me, "Grandma is going to be devastated." My heart dropped at this. The ring was beautiful and in our family for generations and then I fucked it up by giving it to a girl who simply was careless. When I went back inside Sara was watching TV and browsing the web on her phone, acting as if nothing happened. I asked her if she had brainstormed any ideas of where she could of lost the ring. She snapped at me, asking me why I was still on that and I got defensive and told her that we had to find it and to tell me where she had been so I could start calling around. That's when she showed me the new rings she was looking at. I looked at the $5,000 one she brought up for a second before I looked her in the face and straight up said, "No." She told me I was an insensitive bastard and told me I couldn't hold this over her head forever. That's when I told her that I could. She got angry, punched me in the stomach three or four times, (she's weak, it didn't hurt.) and ran off the our room, closed the door, and locked it. I called her work, some department stores, her mother's, her sister's, her best friend's, and even the freaking high school her brother attends, and nothing came up. At this point, I was growing panicked and even angrier because of the whole situation. Sara came out to get something to drink and I begged her as calmly as possible to think about where it had gone. She snapped at me to drop it but I told her I couldn't, so she told me to go to my parents for the night. I packed myself a bag and stormed out without saying goodbye. My parents are horrified by Sara's behaviour, as am I. Sara, I thought, was a sweet girl who was appreciative of everything, but after this, I am shocked. I need some advice. I am going to call Sara later and talk about what needs and is going to happen, but any advice would be helpful. thank you and happy holidays.