Anon, I'm telling you this with your best interest at heart here. You are trying to pull someone who is toxic out of the deep. I've tried the same thing and failed twice.
To give you some background my two best friends (talking known them since we we're little kids) we're like brothers to me. I tried to help them out any chance I got. Got them on where I worked doing digital design and video editing. They both ended up spiraling into drug abuse and fucking me over. I had to cut both of them off. I had to move on and take care of my self.
You have to do the same because if you don't you're going to kill your self trying to save someone who does not want to be saved. Anyone who is willing to submit themselves to that is no thinking with anyones best interests at heart, and has no desire to do so. You will be brought down, you will not bring this person up.
> tl;dr don't hand yourself for this person it's not worth it.