Help me figure out how to make this work!?

Why would you be in a relationship with a drug dealer...? I know you want it to work for your children, but honestly it seems like staying in the relationship with this guy is WORSE for your children than ending it. They should not be in an environment like that. They don't need that influence. Get him out of your life, if the best interest of your children is your priority. You're approaching this situation in the wrong way if that's what you want to protect. Do not stay with him when he's like this, for the sake of your children. Please.