Which one of you two is more easily jealous?
Actually it’s Germany haha. He can’t lie that he always feels insecure whenever he sees France together with his ex, England. Germany once complained about this and France assured him there’s nothing going on between those two anymore (even their relationship is more to enemies than friends). But still, sometimes, just seeing them talking and laughing together can really make Germany uneasy. They don’t look like enemies who hate each other, actually, quite the opposite. It is as if they unconsciously build a circle that no one can enter but them. As Germany is pretty aware too, France and England have a long history together that he can’t possibly hope to top.
But since Germany can’t really do anything about that, he just put up with his jealousy, keep pretending nothing is happened even though deep inside it feels like there’s some fire burning his heart, gradually trying to turn it into ashes.