I call friends,
Mate, Budd, hun (female friends) their name, shitface... Whatever.
My fiancee
The Mrs, babe, sexybum, woman (only in jokes)
Jane has never minded me calling her babe or the Mrs, only one she doesn't like is... The wife! She said it's what her ex would say, and felt it insulting n belittling.
If you hear what we say to each other when larking about, your hair would fall out!
Even the cat gets called shitbag and stinky.
It's what normal people do, is have nicknames.