I just use the MCCC mod to tweak relationships. But then again I realize not everybody likes mods. (This from a person who was scared to death of Boolprop in Sims2.) I've come a long, long way. LOL Had to mod up Sims3, just to be able to play it. I have a gaming rig, too, and that game was highly unstable.
I do wish we had the ability to create one-sided relationships, though. Unrequited love would make for an entertaining story. But, alack and alas, it's not to be. The Sims either go all-in with their relationships, or they end up hating each other. :open_mouth: Pity. Would make for the perfect love-triangle, you know?