I’m in the same situation but I am still with him. I did leave and come back but that didn’t work, I caved in. Now it’s still the same although maybe with him using less. I’m raising a baby singlehanded and have 2 older kids.
The only one who will have to make sacrifices will be you. I had to join finances and put trust I don’t have in a person who is only interested in drugs. And the withdrawals are awful. And he is my soul mate so I like you can’t face life without him.
Hope this insight helps, sorry it’s brief as I don’t get much time to type or check in on here.
Sounds like a stick or twist situation and only you can make the decision based on what you want out of it.