Can you help me out with this as to the correct terminology.
My half sister has a boyfriend. She lives in one town, he lives in another town 100 miles away. They've been engaged for about 5 years now and are planning to not get married at any point. They see each other once a month in person.
She got upset at me that I called him a boyfriend. Accepted, I probably should have called him her fiance. She calls him her partner. To me a partner is someone you live with and not someone you see irregularly. It all just seems such a casual arrangement and I don't understand why they done move in together- all very odd to me.
What is the correct term? The one she uses?