Pic related. Third panel.
Why would you say "I'm not real" as your last words? Are you seriously thinking up a cool death fantasy right now where you're on your deathbed or, IDK, you've just been stabbed or something and you're saying to your family or to the police "I'm not real"?
How old are you?
I honestly believe that when we die anything that resembled us will die as well. It will no longer be real, if it ever was. You'll either reincarnate, go to sleep forever, or take a form that doesn't resemble you when you were alive at all.
I don't believe any of us are real, in that there's nothing for us to "be".
Also I had a terrible night where I might as well have been puking and crying and dragging a dead deer up a hill and have gotten the same experience, so this seemed like a good idea at the time.