How to stop divorce in sexless marriage

I m 30 years old female working at a low salary and my husband is a lawyer too, i hav been married for 4 years and my marriage is sexless as my huaband was in rehab for excess drinking after 1 year of marriage for 9 months now he is sober for 2 years. He had no problems till 3 months earlier with our relationahip, suddenly he accused me for not having sex while i never denied him for it, so far he never gained courage to do so, now he accuses me for it, and is preparing to file a divorce case next month. I m in no position to bare this trauma of divorce as i m still in shock and in crisis of his rehab both mental and financial. He is a good human bt for now he is under some influence to call for a quit. I m with my inlaws and they supported me in the best possible ways and they too dont want this divorce as this will ruin the life of both of us as well as our careers and the respst of the two familes. I dont know abt law much, i want to know can tgis divorce happen if yes how can i stop it. Thank you