Former NBA star Lamar Odom is celebrating 100 days sober — sharing an uplifting message with his nearly 1 million Instagram followers. “There are days I don’t think I could make it,” the former Lakers star wrote Thursday. “But with God’s grace, the love of the people around me, and a commitment to myself, I’m still standing.” Lamar Odom celebrated 100 days of sobriety on Thursday. Javiles/Bruce / BACKGRID Odom’s sobriety streak began in January, shortly after he was arrested for allegedly driving under the influence in Las Vegas . Authorities claimed they pulled him over for going well over the posted speed limit of 65 MPH and he allegedly reeked of marijuana during the ensuing traffic stop. They also stated he failed subsequent field sobriety tests. The criminal case against him remains ongoing. It’s unclear if the incident sparked Odom’s abstinence from substances, though he was nonetheless clearly proud of how far he’s come since the run-in with cops.…