You are addicted to cycling when...
* Your commute to work is more important than actually having a job.
* You have more bikes than you can poke a stick at.
* You have only a few bikes but dream about getting the next bike.
* You pedal in your sleep to the annoyance of spouse.
* Your clothes fly off your body and into the LBS when you pass by. After fetching your clothes, you discover items you bought but have no immediate use for.
* You have many more bottom brackets than bikes.
Add on...