You totally make sense and no, you are not insecure. I think you gave a very thoughtful explanation of why you want to wear it on the subconscious level. I would wear it if it were pretty or practical; I have no superstitions or insecurities about another person's former property.
I think you are also the type who knows who she is and a bit of a thinker. Personally, my relationship with my DH is comfortable, I'd go ahead and let him know I'd be wearing the rings if that was ok by him. And knowing my DH, he'd say go for it because he is not sentimental at all, if anything, he'd have probably saved it for more materialistic-financial reasons. For yourself, you need to wear them for a little while to satisfy some urge for a while, maybe to connect with the young man in your SO which is natural. I used to look at baby pictures and try on jewelry from long ago and wonder what my DH was like and so forth.
He's your SO and if he chose you, he's not looking back. He's probably a rather practical type given what you've told us here and doesn't strike me as the nostalgic type.
I think you are also the type who knows who she is and a bit of a thinker. Personally, my relationship with my DH is comfortable, I'd go ahead and let him know I'd be wearing the rings if that was ok by him. And knowing my DH, he'd say go for it because he is not sentimental at all, if anything, he'd have probably saved it for more materialistic-financial reasons. For yourself, you need to wear them for a little while to satisfy some urge for a while, maybe to connect with the young man in your SO which is natural. I used to look at baby pictures and try on jewelry from long ago and wonder what my DH was like and so forth.
He's your SO and if he chose you, he's not looking back. He's probably a rather practical type given what you've told us here and doesn't strike me as the nostalgic type.