“Sweetheart” for girlfriends… actually, only the last one. “Darling” or “love” for girlfriends or very good friends (not guys, though… with guys, it’s always by names). “Sweetie” I don’t like being thrown around… it doesn’t sound right. And it’s sissy. Works as a pet short form of “sweetheart”. “Honey” is a bit more general, I think, but I hate the concept (Honey? How about strawberry jam?). I also remember a couple of more individualised ones. The girl whom I love but who has probably dumped me for good got Hotbrains… a funny one to say I was attracted to her mind and personality more than looks (and was she beautiful… never seen a prettier one).