Whenever asteroids come close to earth I always get a bit paranoid and worry that there is a conspiracy to cover up the fact that it's actually going to hit earth and kill us all.
Look at the bright side. You'd probably only feel excrutiating pain for only a few seconds.
Only if you're right at the impact site. Otherwise, the next few centuries are going to really suck with all the aftereffects of the impact. Possible firestorms, dust cloud-induced nuclear winter, food shortages from mass crop dieoff (insufficient sunlight), possible wars over whatever is left of civilization...
Yeah, not really such a quick death after all.