Only you can decide what is right for you. But, having said that, I would urge you to take inventory of your life. Forget about the wedding and the money spent, forget about the promises and the attempts, forget about the possibility of what might happen. Those things are in the past, or the future.
What about NOW? What is the reality of the present moment? Is it where you want to be? Take a good, hard, long look at what is. If it's not what you want for your life, you have the power to change it. Yeah, sure, he could go to rehab and get sober. Then again, he could go to rehab and wind up right back where he is now.
Are you willing to take that chance? If I have learned anything through this process, it is that I have no control over the past or the future. But, I do have control over the present. I can do RIGHT NOW what is best for me, and deal with whatever happens in the future WHEN IT HAPPENS.
What do you want NOW?
L