Kanye West -- Kim Kardashian's My 'PERFECT BITCH'

Must be true love ... Kanye West just announced his new song "Perfect Bitch" is about his girlfriend Kim Kardashian.

West debuted the track last weekend at a club in NYC -- and today, he took to Twitter to address rumors the song was written about his new lady ... turns out, it was.

The song has NOT been officially released yet -- but a source told the Daily News, the lyrics are "about his search for the perfect woman and how he has now found the 'perfect bitch.'"

Rap's got a terrible reputation of being misogynistic -- and using the word "bitch" doesn't help -- but this song seems to have a romantic spin on it ... so we gotta ask ...