>>96270 (OP)
assuming weve been in a mutual relationship fur some time and this sort of behavior only shows up when she ruminates on worries she has.
id sit down with her and hug her to calm us down. id tell her i'll wear it if it really means a lot to her, or at least keep it with me because i dont like how rings feel, but that she needs to know im with her because i like her, not because some ring says were together. that im happy with her and id never betray her trust because i think its wrong and i could never hurt her like that. Id tell her it scares me when she gets like this because i want her to feel love, not obsession, and that seeing her stress about this makes me sad because im worried i dont know how to prove to her that i love her when shes fixated like this.
id plan out some extra time we can spend together over the next few days and show her lots of affection
fun thought experiment but fluff you anon fur making me think about a girlfriend i dont have