My sim married the Chinese bookstore woman. There has been a bug mentioned, but sometimes the relationships can be complicated.
In the top left corner, there is a box with relationship when your sims are socialising. Under that a box which says what the sim thinks of your sim. You must queue certain socials to advance in those levels.
Find out if the sim is in a relationship before, you could still break them up, but that's mean, (depends what type of player you are
)
Romantic
- You must get the sim thinking your sim is extremely irresistable, the options should then appear.
Friendly
- Move in requires the other sim to think your sim is either socialable or friendly, then the option should appear.
If that doesn't work it is probably a bug.
[Edited for punctuation and typos. Please use preview before posting to avoid excessive editing. Thanks! -Pam]