welcome to SR
There are a few things you can do to make this situation better for yourself. Coming here is a great start. Try to find a good al anon meeting in your area and keep going.
Al anon is not for him, but you.
Snooping comes hand in hand with someone who is with an addict.
We have little choice if we need to protect ourselves from the damage they cause.
Had I not snooped on my ex, he would still be cheating and maybe could have given me a life threatening std.
Also, thinking your going crazy is also par for the course. Addict gaslight and lie and will do just about anything to keep their sickness in place.
Maybe I read your post wrong, but I don't see where he has any potential to be violent. He's a pain in the a&&, but doesn't seem like he would hurt you
If you really want out, there is only one thing to do, leave!
Borrow money, find a place that takes animals (or lie about having them since a cat and rabbit make no noise) and with the help of your family leave.
If you're not sure about leaving yet, get to al anon and work on you for now.
Sorry for this, I know this is a mess