Or is there a better word?
We're both middle aged and BF seems ridiculous to me, but on occasion I've called him my "partner" and told that's wrong. The distinction seems to really matter to some people.
Been together 10 months, don't live together, highly unlikely to ever live together, but spend a lot of time together, see him more or less everyday, plan our diaries together, go on holiday together etc. Completely seperate homes and finances.