one of my sims had a breakdown too. i'm not sure why, but it was pretty funny. he just sat down on the porch and wouldn't move and a psychiatrist came and shook him and he became happy again.
dzneprincess, about your question on the 3 loves, what you said is correct, you will have it count towards their wants. sometimes i'll have one of my sims at another house and a +3,000 or something of that sort will appear above their heads, it's because they fulfilled something that they wanted. i once had one of my sims propose to a love aspiration sim and he accepted, and then had a -5,000 appear above his head. too bad i just want all my sims to get married all the time...i still haven't been able to figure out how the wedding arch works though. i had a wedding party and everyone was there all dressed up and i had the wedding arch, but i couldn't click on it to have them go and get married there, they always end up getting married in the house, which is lame.