Jackson calls it OD'ing - Overplaying Dylan. I can't help myself. When I start listening to Bob, I can't stop.
Two things you should do if you are similarly taken with Bob's music:
1) Get a copy of No Direction Home DVD and watch it. Scorsese did a great job with this documentary.
2) Get the soundtrack to No Direction Home and listen to the live version of Ballad Of A Thin Man from the 1966 tour. The sound quality isn't great, but its the best version I have ever heard of this amazing song.
You can get both from Amazon for less than $40.