Starting to get very ANNOYED with husband?

So in the beginning I turned him down for dates because he smoked weed, popped pills, and had no job. We eventually had a date after he stopped smoking and taking illegal pills and enlisted in the USAF along with me. A couple years later while I was pregnant he had a few friends that lived on base with a military spouse who smoked weed, I started suspecting he was smoking as well even though he denied it, then I found a pill on the floor in our house and after researching it I found out what it was. Later he tells me (like a dumb ***) that he put a blunt to his mouth and never smoked it but every time he has a surprise drug test he drinks gallons and gallons of water before he has to be up there to take the test. To top this all off (we are no longer in the service) he went and smoked some weed last night and then today (Sunday) the bank is closed, he has no money and takes gas money from our sons piggy bank. I am really ANGRY. He barely helps with our son and he lies about silly things even when I know the truth he still tells the lie until he finally is wore out and then he doesn't understand when I tell him that I can't trust anything he says. He also can't understand that now since last night he isn't allowed to take our son anywhere unsupervised (without me) it's either his son or his weed ( and I'm starting to think it's either me and his son or weed and pills). What should I do?