Hello Newly,
Alwlays know that God understands, loves you and wants only the best for you. He does not want you to suffer nor be in pain.
What decisions you make will be for your own wellbeing, health and sanity. You're not quitting on the marriage. Nor on God. You're quitting on the addict/alcoholic. You've made the conscious decision to take your life back, (if that's the case) and to continue living a sane and happy life. And remember that God never quits on you.
Blessings, Kathy