ohh, okay, the gloomy guy thinks that the other one is actually in a relationship with someone and that’s the reason why he doesn’t accept him fully despite the other one already said that the ring was fake and all, the things is that the gloomy guy his mom and his dad weren’t an actual couple, they were an affair, and his mom when he was little always repeated that she was too greedy for asking more than she already have, so he thinks his own relationship is like that, and he is being too greedy and the reason why he reminds himself “don’t be too greedy” when he sees the ring

It's been a while I dont remember the ring significance for the other guy lol