Internet addiction
Internet addiction is described as an impulse control disorder, which does not involve use of an intoxicating drug and is very similar to pathological gambling.  Some Internet users may develop an emotional attachment to on-line friends and activities they create on their computer screens. Internet users may enjoy aspects of the Internet that allow them to meet, socialize, and exchange ideas through the use of chat rooms, social networking websites, or "virtual communities."   Other Internet users spend endless hours researching topics of interest Online or "blogging".  Blogging is a contraction of the term "Web log", in which an individual will post commentaries and keep regular chronicle of events.  It can be viewed as journaling and the entries are primarily textual.
Similar to other addictions, those suffering from Internet addiction use the virtual fantasy world to connect with real people through the Internet, as a substitution for real-life human connection, which they are unable to achieve normally.
warning signs of Internet addiction

• Preoccupation with the Internet.
• Use of the Internet in increasing amounts of time in order to achieve satisfaction.
• Repeated, unsuccessful efforts to control, cut back or stop Internet use.
• Feelings of restlessness, moodiness, depression, or irritability when attempting to cut down use of the Internet.
• Lies to family members, therapists, or others to conceal the extent of involvement with the Internet.
• Use of the Internet is a way to escape from problems or to relieve a dysphoric mood.

effects
Internet addiction results in personal, family, academic, financial, and occupational problems that are characteristic of other addictions.  Impairments of real life relationships are disrupted as a result of excessive use of the Internet.  Individuals suffering from Internet addiction spend more time in solitary seclusion, spend less time with real people in their lives, and are often viewed as socially awkward. Arguments may result due to the volume of time spent on-line.  Those suffering from Internet addiction may attempt to conceal the amount of time spent on-line, which results in distrust and the disturbance of quality in once stable relationships.