Allies: These are nations who I have entered pacts with and who I have treaties with:
Friends: these are nations who I'm not in alliances with but I still trust and like:
Neutral: These are nations who I don't 100% trust, but I'm not outright enemies with them:
Hostile: These are nations who I straight up do not trust, who I don't like, or who don't like me:
Terrified: These are nations who I stay up at night, horrified of, terrified of what they are capable of doing to me and my allies. This doesn't mean I don't like them, it just means I'm kind of afraid of them sometimes.