Oh boy mstrust
I think hes your addiction. I know this is hard , and I feel your pain.. But please dont let him take you down, and stop trying to hold him up. Like another poster said you've got to let him fall. He will eventually fall, but your choice is to watch it, or walk away from it (I personally think BOTH are going to be very very hard)
You've got a addiction yourself as you said, I think you need to look at him as another addiction.
I am sending you a HUGE cyber HUG!! I know what its like not knowing what the right choice is or what the right thing to do is. Blinded by all that fog and uncertanty, If you had a daughter and she was telling you this stuff about her love, what would be your advice to her?