I have had the stomach flu since sunday and always feeling nasues, 3days in now i have water diarrhea non stop? is this the end of the virus??

Maybe: Your immune system may or may not have gotten rid of the virus, but, clearly, you still haven't healed from the damage the virus caused. Continue to drink a variety of clear liquids (sports drinks are a good choice.) If you're hungry, stick with bland, non-dairy foods (yogurt okay). If not back to normal in a week or you get new symptoms, seek medical care.