Vanity and pride are different things, though the words are often used synonymously.... Pride relates more to our opinion of ourselves, vanity to what we would have others think of us.
Bitch (noun): A woman who won't bang her head against the wall obsessing over someone else's opinion - be it a man or anyone else in her life. She understands that if someone does not approve of her, it's just one person's opinion; therefore, it's of no real importance. She doesn't try to live up to anyone else's standards - only her own. Because of this, she relates to a man very differently.