Hi HW,
I can’t imagine what you’re going through. Yes he’s vulnerable, but by god so are you and his is a choice, yours isn’t. Your choice is whether to allow his actions to rule your happiness.
He has to take responsibility honey, not you. You’re not his carer, you’re meant to be equal and while he’s on this evil drug you’re not equal by a long stretch as it will be taking all his attention.
Be strong and think about you, stop exhausting yourself worrying about him.
He has a decision to make, you’ve laid your soul bare, he knows the score.
Sending love x