Partner is the word.
If your friend thinks there's a better word, ask them what it is.
A community for discussion of Polyamory as well as other Ethical Non-Monogamy styles.
Simple rules:
Partner is the word.
If your friend thinks there's a better word, ask them what it is.
Consorts?
Partner is great and is non-gendered (in English). You could also go for the classic or boyfriend / girlfriend or "I'm in a relationship" or significant other. They all work but you do you. If you feel like partner is best and you're romantic interest is cool with that title - go for it.
I once panicked introducing a friend and said "lover". Don't think I could have made everyone involved more awkward if I had tried.
I like primary. Secondary sounds like you're ranking people however.
Let me know if you figure it out. Not that I'm participating any longer, but I am curious.
If you feel like partner is the right word, then I'd back you up on that.
Call them whatever you want. Your relationships your choice. There's no need to gatekeep every little detail ffs.