Sims 3 has stopped working , keeps happening !

I'm in love with sims3 ! If only it worked I could marry it !

So as everyone else I've followed sims for years, ofc! And I recently downloaded off Origin sims 3 , pets and ambitions and it keeps "stopped working" after a few mins of gameplay ! Please can one of you Heros save me ! So me and my sims can meet again !!