A crack addict's first and only love is crack.
A crack addict will do just about anything to get his next fix, becoming the meanest, nastiest and even violent person without any scruples when it comes to getting his crack. You are putting not only yourself at risk, but your daughter as well.
Does he do crack in your home? If so, and he gets busted at your home, you could face charges, especially connected to child protection laws.
Please, don't ever leave your daughter alone with him.
Crack completely takes over the crack addict's life and they can live for years this way. I had the mistaken notion that the body could not hold up to crack addiction very long, but this is not true. There are two crack addicts in a village in Antigua who are still alive with their crack addiction after more than 25 years.
As others have said, get away from this abuse. You cannot help him out of his addiction, only he can. You deserve someone who loves you and respect, trust and appreciation are the foundations of your relationship. Your daughter should not be exposed to this type of person.