I will keep all my fingers crossed for you, and your BF, and you as a couple - even in the hope of recovery, the merry-go-round can be terrible....
I don't know if you've said or not previously, but, is your bf trying to be sober w/o support? AA, Smart Recovery - some kind of support group or counseling?
Mine has been more or less going it alone, although he has finally found a sponsor he connects with, and is going to one AA meeting a week....
And you - are you going to Al-anon or seeking support from "live" people? This site is incredible, but I find the contact with flesh and blood support different and also great. No judgment either way, just curious...