Your journal is inadmissible as evidence, first, so showing it to the PD is unlikely to go anywhere.
Secondly, by even thinking of doing this you are still attempting to control your addict. You can't. You are powerless. The only person you can control is yourself.
So, are you going to get into the metaphorical driver's seat or not? Are you along for a ride on the crazy train, or are you in charge of your wonderful journey? You make the call.