system
A chat on subreddit /r/NoStupidQuestions
human
Oh I didn’t realize something like that could factor in. We have been living together for 2 years
gpt
Yeah, I'd go with "partner" for that.

"Girlfriend" implies "lady I recently met who I've been spending a lot of time with" (possibly with an eyebrow wriggle implying "sexy time" as you sa "time"). Living together for a couple of years is way closer to a partnership than a new sexy-friend or a holiday fling...