If you want to know a little about Net addiction, I recommend you to take a look to this page of a private clinic dedicated to the treatment of addictions: https://www.centroadiccionesbarcelona.com/patologias/tratamientos/adiccion-a-internet/
I don't know this clinic at all and I don't recommend it, but I think the information they have in this page is a good first guide to understand what can be a Net addiction, do you?
Anna G.