(Don't know if this has been said already. I'm not looking through all these pages). I was unaware of how many romantic relationships there are in the game. I had found out that there was a "Just Good Friends" romantic status when my two sims were good friends, but had a little to almost no romance bar. They didn't do romantic stuff for awhile. I'm so used to having my sims be in love with each other from the get-go, I never stopped and tried to have a slow relationship. So, their romantic status is always "lovebirds" or "soulmates". Their romantic status depends on both friendship and romantic bars.
Some of my favorites are "Enemies with benefits" (which I really want to try one day!), "Hot and Cold", and "Awkward Friends".
(Wish I could share the site where I get this stuff from! Being a new member is annoying...)