She kept him 'in suspense' [=waiting anxiously] for two whole days before she agreed to marry him.
I don't know who won and 'the suspense is killing me'. [=I am very anxious to know who won]
The 'suspense' builds as the story progresses.
(..) I'm the prestige, and Root's below stage. No, the anticipation of the trick is everything. We need your showmanship to build up the suspense. Once Root opens his mouth, it's over. He can't introduce this trick. Of course I can. I'm the Great Danton. Root, you bloody fool, (..)2006 The Prestige