Same I have been having the same problem as well and I don't know I have had sims 3 for like a month now and I played it 2 days ago and now when I press it it just says its loading but nothing ever happens.
@piterowski213Have you ever cleared your five cache files from your game folder? They're in Documents\EA\TS3. They can be safely deleted (and should be often), and they'll regenerate each time you load the game. For reference, they are:
If this doesn't help, try dragging your entire TS3 game folder out of Documents and onto your desktop. Can you then launch the game and load a brand-new save? If so, you can start moving your existing saves and other content into this folder from the old one. Test your content out in batches; if you suddenly can't load the game again, you'll know that one of the files you just moved is corrupt.