You have knitting projects for home, work, car, and significant other's car.
Your significant other reminds you to bring your knitting when you go on a long car ride, and knows just which project you'll bring depending on the length of the trip.
Your co-workers see you and don't say "hi" but instead greet you with "Knit one, purl two".
You have more than one blog, one for life and one for knitting.
You have a flickr/photobucket account that is just for your knitting pictures.
Your friends have to qualify, "Lets have dinner tonight and hang out.....but don't bring your knitting."