I second the Meaningful Stories mod, when my sims lost their parents it took DAYS for them to get over that, and even after the sadness left they still had a little bit of lingering sadness before it tapered off and finalyl allowed them to feel fine. My sims are only ever happy when something good happens to them, and only very happy when something amazing happens to them like a marriage or a new baby. It has completly changed the game for me. If you download meaningful stories you don't need the tru happiness mod as it's already included with the meaningful stories mod.
