Blog addiction is something that is often joked about among bloggers, but I believe it can be a serious problem. I don't know if there is any serious research about blog addiction specifically, but there is plenty about internet addiction in general. It seems silly to find internet addiction resources on the internet, but there are some useful ones out there.
Here is a quiz to find out if you might be addicted to the internet:
internet addiction quiz
Here is a scientific article discussing the symptoms, evaluation, and treatment of internet addiction:
article from healthy place addiction community
The article discussing a variety of techniques for dealing with internet addiction:
(a) practice the opposite time in Internet use, (b) use external stoppers, (c) set goals, (d) abstain from a particular application, (e) use reminder cards, (f) develop a personal inventory, (g) enter a support group, and (h) family therapy.
Please read the article for more details.
They mention that it's not practical to stop all internet use, as it's become an important part of the world (for communication, business transactions, etc). The techniques for dealing with internet use are similar to the ideas for dealing with any kind of addiction.
If you believe you have a serious problem, I would strongly suggest seeking professional help or at least discussing it with someone close to you (family member or friend).