I have not posted in a while but some may remember... husband smokes marijuana... da da da.

Anyway, I reached my end point with all of that. I went on vacation last week with my mother and sister. I was gone for a week. When I came home my husband was there (we are separated) and he was in a crappy mood. He would not carry my stuff in and we fought all night. Kept saying that I cheated while I was gone. I didnt do anything while I was gone. Then later on he tried forcing himself on me. I had been on the road for twelve hours and I was so tired. Anyway, the next day was the same ol' thing, I told him I was giving him one more chance to make his decision between me and marijuana. He has flat out refused to quit period. So I told him I was done with the relationship and then he left.
Here is the kicker...... I told him I was done and that it was over because he had made his decision. Well, he shows back up last night like nothing happened. I asked him if he didnt understand what I said and he said he understood. Well, he would not leave even when I asked him to.
So, what do i do? I told him it was over and he completely refuses to just let it go.

If you are certain, see a lawyer,
and for your sake find a Narc-anon program.
Unless you make a move, he will continue to believe that he can stay there.

in this situation your holding all the cards, you claim he's using and he's forcing himself upon you,a visit to your local court house can get you an instant restraining order and have him removed,its the most abused law in existance but if he's really a danger to you its your out.
A few friends of mine were restrained from their homes and didnt see any of their posessions for over two years..... BUT, if he's a nut job there is always the chance that he will go off and really do harm after served with a restraining order, is that really best or should YOU just leave....???
the law can ASk him to stay away, but they will not protect you 24/7 from him returning in spite of the order, best of luck to you.