How can I make up for losing his ring?

My boyfriend gave me his class ring at the end of the year. It’s something I like to keep on me at all times, because it’s romantic and it reminds me of him. Usually I wear it on a chain around my neck, but as I was wearing a different necklace he had given me, I put it in my pocket instead. I remember feeling it a few times during the day running errands, but when I got home, I realized later I couldn’t find it. I’ve checked my pockets, torn apart my room, and checked around my jewelry box, where I remember seeing it before, perhaps before we left or after. I plan on calling all the stores I visited yesterday, and if they haven’t seen it, going there a searching a bit for myself. If that and turning over the house again doesn’t work, I plan on attempting to buy a new one.

I’m just afraid he’ll be particularily disappointed because THAT was the ring he bought to commerate his senior year, and he gave it to me thinking I would keep good care of it, and it has romantic meaning, and I lost it. A replacement won’t have the same sentimentality.

Anyone have any more advice for finding it? How else can I make up for it, and how should I present this issue to him?