Addiction is usually seen when you do something despite negative consequences. Take a look at how it's affecting time with your family, exercise, eating habits, relationships, and the content of what your looking at.
What Is The Negative Impact Of Internet Addiction?
I suppose it is similar to many addictions, becoming reserved and cut off from friends and family, general health concerns such as sight, carpel tunnel and rsi but its mainly due to the social factors that it gets demonized