Ok, so last night I was driving and all of a suden I looked down and noticed the car was off. So when the car stopped I turned it back on and didn't think anything of it.

Well, this evening I drove it around a bit. Long enough for the car to heat up. Then I turned it off for maybe 10 minutes, and when I got back in it wouldn't stay on. I mean, It would run for as long as I held the key on, but as soon as I let go of the key it would just turn right off. I can even rev the engine while the key is turned, but it just imediatly turns off when I let go of the key.

I know it's not the battery, but I'm out of ideas at this point.

Any suggestions?

 

Its most likely your ignition.