What to do

Erica • Baby boy due Feb 2016 ❤️
I'm so tired of my SO smoking marijuana. He had told me he stopped, and was doing better. Then yesterday I caught him in a lie and found out he's smoking again. Of course he tried to make me feel bad, saying things like I'm always complaining about something or trying to pick a fight but him of all people knows how I feel about it. This really frustrates me bc as of now I'm almost 8 weeks pregnant and I don't need any of these issues. He's also yet to apologize and is still trying to make me out to be the bad guy. Any advice ?