Oh god, I've done almost all of these.

You know you have an RP problem when - 
You've tried to quit more than once and keep coming back.
You may or may not be looking to rework some of your RP's into published book formats. 
You argue with your characters in your head, or even aloud. 
You've been unable to post/write something about a character until you've written exactly what they wish for you to. (Living character model)

You know what I mean by living character model.