SO frustrated!

[bcgurl]

Hi....My first post on here. Hoping someone will have good advice:)

I have know my bf for 6 yrs, we have been together for 1.5 yrs, now living together for the last 9 months. Here's the problem. He was a regular coke user before we were together. Once we were bf/gf he didnt use very much( I dont use any drugs) so he says. Any how, I have told him I cant and wont be with anyone who uses,I have had way too many bad experience in the past with friends and ex's. He says he doesnt need it, I make him want to do better..blah..blah..blah. Well, everytime he "promises" he wont do it, he has. I know when he has, its so easy to tell, yet he looks me in the eyes lying.. and says he isnt high. The next day he comes clean. I have tried the smpathetic approach, the bring it out i will do some with you... I feel so disappointed in him, and pissed off that he lies to me. The most recent--the other night, he came home late...was having beers apparently. ..another lie...came home high, said he pinky swears he was not. i knew he was lying and I was not happy. I didnt say anything about it. Now I started to snoop....( he likes to hide things) and i looked in his wallet to fins a little bag with coke in it... I flushed it ...i WAS not happy. Now, I have not said a word about the find, and he hasnt not said anything...of course. I feel that his coke problem is more important than our relationship. I am having a very hard time believing anything he says to me, let alone trusting him. Do I say something , Do I just follow through on my threat to leave, or do I help him?? He wants to marry me, I know I cant marry someone who lies and lies.. because I am not a user I dont understand .

Sorry for this being so long, I dont have anywhere else to turn

[bcgurl]

I fogot to say that I know my bf wasnt using and when we first got together he was thin...he now looks very healthy..although I know he is using again