Some indicators about net addiction are:
Failed attempts to control behavior
Neglecting friends and family
Neglecting sleep to stay online
Being dishonest with others
Feeling guilty, ashamed, anxious, or depressed as a result of online behavior
Weight gain or loss, backaches, headaches, carpal tunnel syndrome
Withdrawing from other pleasurable activities
Some common questions that you should answer if you think you could be a net addicted:
Do you feel preoccupied with the Internet (think about previous online activity or anticipate next online session)?
Do you feel the need to use the Internet with increasing amounts of time in order to achieve satisfaction?
Have you repeatedly made unsuccessful efforts to control, cut back, or stop Internet use?
Do you feel restless, moody, depressed, or irritable when attempting to cut down or stop Internet use?
Do you stay online longer than originally intended?
Have you jeopardized or risked the loss of significant relationship, job, educational or career opportunity because of the Internet?
Have you lied to family members, therapist, or others to conceal the extent of involvement with the Internet?
Do you use the Internet as a way of escaping from problems or of relieving a dysphoric mood (e.g., feelings of helplessness, guilt, anxiety, depression)?
Yo can find information about this in this website: netaddiction.com
It's a center about net addiction and you can be in touch with if you need help or recovered from a net addiction. They have articles about this kind of addiction and treatment services.