Maybe I have it, it's been years already since my school years. Think I'm able to go all day online, I guess.
Thing is, I have a habit of visiting certain sites many times each day - sometimes to see if any updates, or just visiting without any reasons at all.
At the moment, I can't control it. My bookmark list is full of many things useful in Internet that I planned to do, but it keep being delayed due to that habit above. As time passes, it could be months before I took a look at it back.
Of course, this do affecting my life. Jobless now, so since job-hunting being predominantly done in Internet - and I'm easily distracted - you can see where this is going. Still, I'm glad this didn't affect me at all on my previous job, perhaps not owning a smartphone helped on that fact.
Going online distracted me from facing those supposed problems that I suspected I had, so don't know if being Internet addict is good or bad in my case.