It sounds like you did quit for you, because you wanted something for yourself you didn't think you could have while not-sober.
But I guess my question is, what would happen if this relationship ended? Would there then be nothing keeping you from going back to drinking? My instinct says no, but I only know you from reading your posts. I don't think my instinct is wrong, but I do think that is the question for contemplation here. JMO.