Buck and Eddie: Breaking Up and They Haven't Even Dated

It's been noted by a lot of us 9-1-1 fans how much the writers like to use romantic or relationship coded language for Eddie and Buck scenes. For instance, why in both of these scenes from episodes Rage (season 3 episode 5) and Outside Looking In (season 5 episode 11) does it feel like these conversations are after they broke up. It's just so funny because they have had two post break up conversations and they have yet to date or be in a relationship.

In Rage, they were both angry due to the lawsuit Buck had filed which made it so that neither one could have contact with each other. While in Outside Looking In, it was more like a quiet resignation or acceptance that what they had was over. It really makes me wonder why would the writers give them these words? And why would they have the actors react in this way for these scenes? Everything about these scenes holds a lot of subtext that's for sure. If these two are supposed to be only friends then why use this type of break up language for them?

9-1-1 season 3 episode 5: Rage
9-1-1 season 5 episode 11: Outside Looking In