We all hear them. Those damn sounds in your house when you're alone, like the floors creaking, the stairs sounding like footsteps are moving on them, and sometimes if you're really paranoid, whispering. Hell, you can probably see shadows if you're scared enough.
But let's all be honest, we're not scared of those things because they're actually scary; we're scared of those things because if there IS something causing those sounds, we are completely helpless and defenseless against the threat.
If someone actually does attack you, you do not have friends or family to help you fight off the person/monster/whatever the hell you're afraid of attacking you, so it's good ol' one vs one combat, but the opponent probably has a weapon so it's the slightest bit unfair, or if it is some kind of monster... well, yeah. Well, I'm here to make you feel better. All those sounds you hear aren't a monster stalking you, ready to strike any minute, nor an intruder trying to murder you. Trust me, it's you just being paranoid. Nothing really to fear.
Here's a thought though; maybe you should be more afraid of the things you can't hear. I mean, if you were a killer, would you want to give your victim signs of you being there, such as footsteps, hard breathing, rustling, or other noisy shit like that? No, of course not. That's just stupid right there. If I was a killer, I'd want to be completely silent, making the slightest amount of noise possible, going for the kill when their guard's down, attacking them before they even know they're hit; maybe when they're asleep.
That's just a thought though, of course.