Are you a human being, adefinitemaybe? It seems that all humans in the past have died, and all humans currently alive appear to be following the same pattern that leads to eventual death. How are you different from other humans who are known to be mortal?

Your suggestion that you are immortal is basically the same as saying, "cars are known to break down under certain conditions, and my car is just like the others, but this specific car hasn't broken down yet so I'll assume that it will never break down."