Disick, 31, is determined to stay sober to prove to his girlfriend, who is pregnant with his third child, that he is serious about their relationship, reported Contactmusic.
Last month, the 'Keeping Up with the Kardashians' star, who has children Mason, four, and Penelope, two, with Disick, kicked him out of their Hamptons home because she was fed up of his hard-partying ways.
The couple, who have been together for eight years, have allegedly been having relationship counselling with Pastor Rich Wilkerson Jr to get things back on track following a string of recent rows.