Should I pay for two promise rings?

Boyfriend and I have been or were together for over two years. I recently broke up with him but it’s complicated. We’re not together but it’s kind of in more of a taking time to get better way. We both expect to get better from it and come back to each other and have said this. We both have agreed we don’t want to see other people and we want to work on things. About a month ago I lost the promise ring he gave me and I offered to pay him back. He refused but I still told him I would and after basically begging he said I can. His initial reaction wasn’t to get mad but he understood these things happen. Later the emotions kicked in and he got mad but I understood it. We got better and settled I’ll pay him back and he’ll use the money to buy me the same one. I guess I’m saying I’m paying to replace it. I recently got a full time job but that last about 2 weeks to a month. This at least give me money while I look for a more stable one but I still make a decent amount to pay him back with just this job alone. Here’s the part where I’m confused and frustrated but don’t know if I have a right to be. He was frustrated with me this morning because he told me he bought another ring and I was upset it’s not the same one. For some reason he also made it a point to say it has less diamonds than the last. I was disappointed because I wanted the same one as before cause that’s the one he originally chose and it was special to me to have what he picked for me. I got angry when he told me the only reason why he got a different ring is cause he was too embarrassed to tell the sales person that I lost the ring. He said when he used to work there people made jokes saying if a girl lost a ring she didn’t want it. I still told him he shouldn’t have let something like that stop him from getting me the same ring we both want back. He’s trying to cancel the different ring now. However, he now seems to be asking for double the money for the ring. He wants me to pay for both the one I lost and the one to replace it. I’m ok with doing this if it’s the right thing to do but the way I see it is he bought me one ring because he wanted to. That’s money I would never have had to give him because it was a gift. I’m trying to pay him for one ring either the one that’s lost or the new one but they’re the same price. In the moment I said I’d pay for both without really thinking about it. He said he wants to wait to buy the ring now until I have a more stable job but he already tried to buy another ring without me having that. I told him he doesn’t trust me and he said yes he doesn’t. What do I even do here?