If you continue trying to help him, you may just help him into a point of no return.
You are not helping him by babying him after a toot. You are not helping him by moving out and then running to his rescue.
The "burden" will never be gone for both of you, until, you stop enabling him and he reaches his bottom and seeks recovery for him, not you, him. And, you seek recovery for your codependenc. Right now, as it stands, you are both toxic, to each other.