How to get my Nikon 3000 to not be so blurry on a close up shot?

I just recently bought a Nikon 3000 camera and am not familiar with the settings yet, my friend was messing with it and now on quick snap shots up close it is really blurry and I'm not sure how to make go back to normal! Help!

Added (1). D3000 and it is doing it on the auto and on the automatic no flash.

Blurring is caused either by being out of focus or movement. Use a tripod and try different shutter speeds.

Sounds like it's time for you to carefully read the owner's manual that came with your camera.

With the autofocus turned on, the camera should not be able to take a shot without the focus locking on something. I think there's a menu option to change that. However, the most likely thing is that he may have selected an autofocus zone off to the side, which is locking the focus on the background instead of the foreground. And he may have simply switched the dial to a mode other than Auto. In the Auto mode it will usually check for several possible focus points and normally choose the closest. There's an option to set it that way in P, A, S, or M. Anyway, if it is not choosing the focus point automatically, you need to pay attention on which point is set and what part of your subject is there.

Which 3000?

D3000 or S3000.

There's a huge difference.

My guess is that if your images are blurry, you are shooting at too slow a shutter speed and the camera moved during the exposure

If on the other hand, the images are out of focus, that means you placed the camera too close to the subject, closer than that lens can focus

Restore it to defaults

This is just an educated guess:
You are using all of the focus points in your camera. Because you have all of them active your camera is picking something that is behind your subject and locking on it. You are too close for the lens to focus on your actual subject.
Use only one focus point and lock it exactly where you want the focus to fall.