If you don't want to socialize with the family, can you get out and about - outside of your place? Get a hobby or join a group that you can socialize with?
If it's at all possible, can you cancel the internet plan on your phone or downgrade/upgrade to another phone that doesn't come with internet? I've got a phone that has the capacity of getting on the web but it costs nine billion dollars a minute so I don't go on it. Money is a very motivating factor!
I'm no good example of beating an internet addiction though because I think I spend way over 3 hours daily on the internet.

But trying to incorporate chores and other activities away from my home is very useful to getting me off the internet for some time.