Welcome,
No matter what drug(s) he is on, he is an addict, there is no future with a person who is in the throws of active addiction. He has made it clear, he will continue to use, and is not seeking recovery.
Days turn into weeks, weeks into months and months into years, and if nothing changes, nothing changes.
You have a daughter, she must be your first responsibility, period, end of conversation. No young child deserves to be exposed to an addict or their behavior, and you are the one who must draw the line to protect her.
He will always be an addict, it's just a matter of whether he is active or not. This disease has no cure.
You are young, you need him like you need another hole drilled in your head....Run Baby, Run.