yes you need sims 2 nightlife though. It's a aspiration award you have to buy.
yeah go to create a family mode and type in boolProp testingCheatsEnabled true as a cheat then hold shift and N at the same time, it should say you are in debugging mode. exit and go play your family, click on their relationships bar, and you will be able to drag it whereever you want.
ok this is obviously a glitch. Try actually making them mad at eachother, then make them fall inlove with eachother again.