I'm going to snitch on my so
That can't be true. How do you plan on doing that?
I'm using methods like sending secret information about him to the police anonymously.
If what you're SO is doing is causing you such concern, you should speak to him about it.  Talking to the police is a betrayal of the trust that he put in you.  You have a chance to save him without throwing him behind bars, you should use it!
Fuck off, I'm going to to it.
But don't you love your SO, like he loves you? You should think of how he feels, being potentially betrayed by you. If you are having relationship issues, how about talking it out with a third party mediator, your relationship can be saved!